This consolidation is unofficial and is for reference only. For the official version of the regulations, consult the original documents on file with the Registry of Regulations, or refer to the Royal Gazette Part II. Regulations are amended frequently. Please check the list of Regulations by Act to see if there are any recent amendments to these regulations filed with the Registry that are not yet included in this consolidation. Although every effort has been made to ensure the accuracy of this electronic version, the Registry of Regulations assumes no responsibility for any discrepancies that may have resulted from reformatting. This electronic version is for your personal use and may not be copied for the purposes of resale in this or any other form.
Power Engineers Regulations
made under Section 38 of the
Crane Operators and Power Engineers Act
S.N.S. 2000, c. 23
O.I.C. 2001-412 (August 23, 2001, effective September 1, 2001), N.S. Reg. 108/2001
as amended up to O.I.C. 2008-176 (March 31, 2007, April 1, 2008), N.S. Reg. 152/2008
Table of Contents
References to codes and standards as amended
Effect of common distribution system on power rating
Plant Classification and Registration
Term of plant registration certificate
Information on registered plant
Sealing of equipment upon reclassification
Authorization for reduced supervision
Loss of status as a guarded plant
Plant must continue to meet conditions for reduced supervision
Requirements for Guarded Plants
Maintenance schedule and testing
Technical requirements for guarded plants
Guarded hot water heating boiler plant
Inter-provincial first class power engineer
Inter-provincial second class power engineer
Inter-provincial third class power engineer
Inter-provincial fourth class power engineer
Provincial first class power engineer
Provincial second class power engineer
Provincial third class power engineer
Provincial fourth class power engineer
First class refrigeration plant operator
Second class refrigeration plant operator
Unfired power boiler plant operator
Restricted Temporary Certificate of Qualification
Reinstatement of expired certificate of qualification
Recognition of other Jurisdictions and Organizations
Educational and Practical Experience Requirements and Equivalents
Minimum educational requirements
Practical Experience Required for Certificates of Qualification
Inter-Provincial First Class Power Engineer Certificate of qualification
Inter-Provincial Second Class Power Engineer Certificate of qualification
Inter-Provincial Third Class Power Engineer Certificate of qualification
Inter-Provincial Fourth Class Power Engineer Certificate of qualification
First and second class power engineer course equivalencies
First Class Refrigeration Plant Operator Certificate of qualification
Second Class Refrigeration Plant Operator Certificate of qualification
Compressor Plant Operator Certificate of qualification
Unfired power boiler plant operator certificate of qualification
Practical experience equivalencies
Application and eligibility for examination
Designation of chief power engineer or chief operator
Duties of chief power engineer or chief operator
Power Engineers and Operators Board
Schedule 2–Plant Classifications
1 These regulations may be cited as the Power Engineers Regulations.
2 In these regulations,
(a) “Act” means the Crane Operators and Power Engineers Act;
Clause 2(b) repealed: O.I.C. 2007-218, N.S. Reg. 220/2007.
(c) “ASHRAE” means American Society of Heating, Refrigeration and Air Conditioning Engineers;
(d) “ASME” means American Society of Mechanical Engineers;
(da) “assistant shift operator” means an operator or power engineer who holds a certificate of qualification at least equivalent to 1 class lower than is required for the shift operator and who, under the supervision of a shift operator or shift power engineer, operates or is responsible for a section of a refrigeration or compressor plant;
Clause 2(da) added: O.I.C. 2007-218, N.S. Reg. 220/2007.
(e) “assistant shift power engineer” means a power engineer who holds a certificate of qualification at least equivalent to 1 class lower than is required for the shift power engineer and who, under the supervision of a shift power engineer, operates or is responsible for a section of a plant;
Clause 2(e) replaced: O.I.C. 2007-281, N.S. Reg. 220/2007.
(f) “automatic control” means a device that starts, stops and modulates the action of a plant without the intervention of a person;
(g) “certificate of qualification” means a certificate of qualification issued under subsection 31(3) of the Act;
(h) “continuous supervision” means, in relation to a plant, that a power engineer or operator is located
(i) in the plant within the audible and visual range of the alarm system for the plant, and
(ii) in the primary control area of the plant where they can manually control the plant by starting, stopping, restarting or modulating the operations of the plant;
(i) “CSA” means the Canadian Standards Association;
(ia) “direct supervision” means, in relation to a trainee at a plant, that the person who is supervising the trainee is physically in the plant, has control over the trainee’s activities, instructs and directs the trainee and is in direct communication with the trainee whenever they are performing the duties of a power engineer or operator;
Clause 2(ia) added: O.I.C. 2007-218, N.S. Reg. 220/2007.
(j) “extended alarm system” means an alarm system that
(i) extends beyond the room that houses the plant,
(ii) audibly and visually warns the power engineer, operator or any other person in the vicinity of the plant of the occurrence of any abnormal operating condition of the plant, and
(iii) cannot be shut off until the abnormal condition is rectified or the plant is shut down;
(k) “fired” means, in relation to a boiler, that the boiler contents are heated by electricity or the product of combustion of a fuel;
(l) “guarded” means, in relation to a plant, that the plant is equipped and maintained in accordance with the requirements of Sections 17 to 22 of these regulations so that it functions automatically under a continuously attended monitoring system;
(m) “heating boiler” means
(i) any fired steam boiler equipped with a safety valve designed to operate at pressures not exceeding 103 kPa (15 psig), or
(ii) any fired high temperature hot water boiler designed to operate at pressures in excess of 1100 kPa (160 psig) or with a water temperature at any boiler outlet in excess of 121 °C (250°F);
(n) “inter-provincial certificate” means a certificate of qualification issued to a person who has successfully completed the examinations prepared by the Standardization of Power Engineers Examinations Committee, established by the Association of Chief Boiler and Pressure Vessel Inspectors;
(o) “log book” means a bound book with numbered pages or a record kept in an electronic format approved by the Inspector-Examiner used for keeping a record of plant operations and maintenance;
Clause 2(o) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
(p) “minimum supervision” means, in relation to a plant, that a power engineer or operator manually starts the plant when the plant is not operating under automatic control;
(q) “periodic supervision” means, in relation to a plant, that a power engineer or operator
(i) is located on the plant site within range of the extended alarm system for the plant whenever the plant is being operated and any building containing or serviced by the plant is occupied, and
(ii) manually starts the plant whenever the plant is not operating under automatic control;
(r) “plant site” means the plant and the land on which the plant is situated that is leased or owned by the owner but does not include land that is separated by a public access route;
(s) “power boiler” means any fired or unfired steam boiler equipped with a safety valve designed to operate at pressures in excess of 103 kPa (15 psig);
(t) “Provincial certificate” means a certificate of qualification described in subsections 24(2) and (3), and includes a certificate of qualification issued under subsection 39(1);
(u) “refrigeration” means the thermodynamic process of using a refrigerant to lower the temperature of an item or an area and maintain it at the lower temperature;
(v) “restricted temporary certificate” means a certificate of qualification issued under Section 36;
(w) “sealing” means a measure taken by the Department to isolate equipment so that it will not be operated;
(wa) “supervision” means, in relation to a person in a plant other than a trainee, that a power engineer or operator who holds a certificate of qualification and who instructs and directs the person is responsible for their actions at the plant and provides assistance and support to them;
Clause 2(wa) added: O.I.C. 2007-218, N.S. Reg. 220/2007.
(wb) “trainee” means a person who is in training for certification;
Clause 2(wb) added: O.I.C. 2007-218, N.S. Reg. 220/2007.
(x) “unfired” means, in relation to a boiler, that steam is generated in the boiler without the combustion of a fuel or the direct application of an electrical heat source.
(xa) “unsupervised” means, in relation to a plant, that the plant is operated without an operator who holds a certificate of qualification;
Clause 2(xa) added: O.I.C. 2007-218, N.S. Reg. 220/2007.
References to codes and standards as amended
2A A reference to a code or standard in these regulations is a reference to the code or standard as amended.
Section 2A added: O.I.C. 2007-218, N.S. Reg. 220/2007.
3 (1) A single boiler that is
(a) a power boiler, with a power rating in excess of 500 kW; or
(b) a heating boiler, with a power rating in excess of 1500 kW,
is a boiler plant.
(2) A refrigeration installation that
(a) is located in a public assembly, institutional or residential occupancy as defined by CSA standard CSA B52-05, Mechanical Refrigeration Code, and consists of a refrigeration circuit
(i) containing a Group A1 or B1 refrigerant as classified in CSA standard CSA B52-05, Mechanical Refrigeration Code, and having a power rating in excess of 75 kW, or
(ii) containing a Group A2, A3, B2 or B3 refrigerant as classified in CSA standard CSA B52-05, Mechanical Refrigeration Code, and having a power rating in excess of 37.5 kW; or
Clause 3(2)(a) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
(b) is located in a commercial or industrial occupancy as defined by CSA standard CSA B52-05, Mechanical Refrigeration Code, and consists of a refrigeration circuit
(i) containing a Group A1 or B1 refrigerant as classified in CSA standard CSA B52-05, Mechanical Refrigeration Code, and having a power rating in excess of 150 kW, or
(ii) containing a Group A2, A3, B2 or B3 refrigerant as classified in CSA standard CSA B52-05, Mechanical Refrigeration Code, and having a power rating in excess of 37.5 kW
Clause 3(2)(b) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
is a refrigeration plant.
Clause 3(2) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
(3) An air or gas compressor installation that
(a) uses any type of compressor with a power rating in excess of 350 kW for compressing air or any other non-flammable or non-toxic gas, except oxygen; or
(b) uses any type of compressor with a power rating in excess of 37.5 kW for compressing a flammable or toxic gas or oxygen;
is a compressor plant.
(4) Clause (3)(a) does not apply to centrifugal blowers used in an application in which the air or other non-flammable or non-toxic gas is not stored under pressure.
Subsection 3(4) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
4 (1) The Inspector-Examiner shall rate a plant in accordance with this Section.
(2) Except as provided in subsection (3), the power rating for any boiler shall be determined by dividing the maximum heat output, as specified by the boiler manufacturer and measured in British Thermal Units per hour, by 3412.
Subsection 4(2) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
(3) Where the maximum heat input of the boiler is unavailable, the Inspector-Examiner shall determine the power rating by any of the following methods:
(a) by multiplying the boiler horsepower, calculated by the manufacturer, by 9.81;
(b) where electric power is used as a heat source, by determining the maximum aggregate capacity of all heating elements; or
(c) by carrying out an accumulation test on the boiler.
(4) The power rating for a refrigeration compressor, air compressor or gas compressor shall be the power rating of the electric motor or prime mover driving the compressor.
(5) The power rating for an electric motor or prime mover used in a plant shall be the maximum power, specified by the manufacturer, that can be delivered at the drive shaft during continuous operation.
(6) Every owner of a plant may apply to the Inspector-Examiner to have the total plant power rating reduced as a result of non-operating equipment that has been sealed in accordance with these regulations.
Effect of common distribution system on power rating
5 (1) Subject to subsections (2) and (3), boilers, refrigeration compressors or air or gas compressors that share a common distribution system, shall have their respective power ratings added together and shall be considered a single plant.
(2) Unfired boilers shall have their respective power ratings added together separate from fired boilers.
(3) Refrigeration systems that share an evaporator or condensor shall have their power ratings added together.
Plant Classification and Registration
6 The Inspector-Examiner shall classify every plant in accordance with column 1 of Schedule 2 for the corresponding description of the type of plant set out in column 2 of Schedule 2.
7 The annual registration fee for a plant shall be the amount set out in item 7 of Schedule 1.
Term of plant registration certificate
8 A plant registration certificate shall be valid until the earliest of all of the following dates:
(a) the expiry date provided upon registration;
(b) the day on which there is a change in a condition under which the plant operates that differs from the conditions under which the plant was registered;
(c) the day on which there is a change in the ownership of the plant.
(2) The Inspector-Examiner may issue a temporary plant registration certificate that is valid for less than a year if the conditions for the temporary plant registration are met and the registration fees for a plant registration certificate are paid.
Section 8 replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
Information on registered plant
9 (1) Every owner applying for renewal of their plant registration certificate shall provide the Inspector-Examiner with any information the Inspector-Examiner requests that pertains to the operation of the plant, for the Inspector-Examiner to ensure that the plant complies with the Act and these regulations.
(2) When requested by the Inspector-Examiner, an owner of a registered unsupervised plant shall provide the Inspector-Examiner with evidence of a current maintenance contract or any other information the Inspector-Examiner requests that pertains to the operation of the plant, for the Inspector-Examiner to ensure that the plant complies with CSA standard CSA B52-05, Mechanical Refrigeration Code, the Act and these regulations.
Section 9 replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
Sealing of equipment upon reclassification
10 Where the Inspector-Examiner reclassifies a plant, the Inspector-Examiner shall seal equipment that is no longer part of the plant.
11 Subject to Section 12, every owner shall provide continuous supervision of a plant.
Authorization for reduced supervision
12 (1) On application by an owner for reduced supervision of their plant, the Inspector-Examiner may authorize periodic supervision or minimum supervision of the plant or authorize that the plant be operated as an unsupervised plant if the plant meets all of the following:
(a) the plant is guarded;
(b) the plant is equipped with an extended alarm system;
(c) the plant meets the specifications for the type of plant and any requirements for the level of reduced supervision in Sections 15 to 16A.
(2) On application by an owner for reduced supervision of their plant, the Inspector-Examiner may authorize reduced supervision or a change in the required supervision level of a plant on a temporary basis if the conditions set out in subsection (1) are met.
Section 12 replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
Loss of status as a guarded plant
13 An owner of a plant that is authorized to operate with a level of reduced supervision under Section 12 shall provide continuous supervision of the plant if any of the following occurs:
(a) the extended alarm system or one of the control, alarm and safety devices and systems or requirements of a guarded plant is inoperative or ineffective;
(b) the specifications for the type of plant and any requirements for the level of reduced supervision in Sections 15 to 16A are not met;
(c) any additional requirements imposed by the Inspector-Examiner under subsection 34(3) of the Act are not met.
Section 13 replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
Plant must continue to meet conditions for reduced supervision
14 An owner shall not operate or permit to be operated a plant that is authorized under Section 12 to be operated under periodic supervision or minimum supervision, or as an unsupervised plant, unless the plant continues to meet the specifications for the type of plant and any requirements for the level of reduced supervision in Sections 15 to 16A.
Section 14 replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
15 (1) Periodic supervision may be authorized under Section 12 for any of the following plants:
(a) a fired power boiler plant with a power rating of 3500 kW or less;
(b) a heating boiler plant with a power rating of 10 000 kW or less;
(c) a refrigeration plant whose primary occupancy is a commercial or industrial occupancy and that meets all of the following:
(i) the plant uses Group A2, A3, B2 or B3 refrigerants,
(ii) the plant has capacity control, failure detection and controller systems,
(iii) the plant has a power rating of 1000 kW or less;
(d) a refrigeration plant whose primary occupancy is a public assembly, institutional or residential occupancy and that meets all of the following:
(i) the plant uses a Group A2, A3, B2 or B3 refrigerant,
(ii) the plant has a power rating of 450 kW or less;
(e) a compressor plant with a power rating of 350 kW or less that compresses oxygen or a flammable or toxic gas;
(f) an air or non-flammable or non-toxic gas compressor plant of any power rating.
Subsection 15(1) replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
(2) Where a plant is operating under periodic supervision, no power engineer or operator shall leave the plant site without ensuring that
(a) the plant is operating under automatic control safely and in accordance with the manufacturer’s specifications;
(b) the plant is guarded; and
(c) any building containing or serviced by the plant is unoccupied.
(3) The power engineer or operator for every plant that is operating under periodic supervision shall visit the plant at least once in every 12-hour period during which the building containing or serviced by the plant is unoccupied, to ensure that
(a) the requirements of Sections 17 to 22 respecting control, alarm and safety devices and systems and guarded controls are complied with; and
(b) the plant is operating safely and in accordance with the manufacturer’s specifications.
16 (1) Minimum supervision may be authorized under Section 12 for any of the following plants:
(a) a fired power boiler plant with a power rating of 1000 kW or less;
(b) an unfired power boiler plant that meets the guarded control requirements specified by the Inspector-Examiner;
(c) a refrigeration plant whose primary occupancy is a commercial or industrial occupancy and that meets all the following:
(i) the plant uses a Group A2, A3, B2 or B3 refrigerant,
(ii) the plant has capacity control, failure detection and controller systems,
(iii) the plant has a power rating of 450 kW or less;
(d) a refrigeration plant whose primary occupancy is a commercial or industrial occupancy and that meets all the following:
(i) the plant uses a Group A1 or B1 refrigerant,
(ii) the plant has capacity control, failure detection and controller systems,
(iii) the plant has a power rating of 1000 kW or less;
(e) a refrigeration plant whose primary occupancy is a public assembly, institutional or residential occupancy and that meets all of the following:
(i) the plant uses a Group A2, A3, B2 or B3 refrigerant,
(ii) the plant has a power rating of 150 kW or less;
(f) a refrigeration plant whose primary occupancy is a public assembly, institutional or residential occupancy and that meets all of the following:
(i) the plant uses a Group A1 or B1 refrigerant,
(ii) the plant has a power rating of 450 kW or less;
(g) a compressor plant that compresses oxygen or a flammable or toxic gas that has a power rating of 150 kW or less; or
(h) an air, or a non-flammable or non-toxic gas compressor plant that has a power rating of 750 kW or less.
Subsection 16(1) replaced: O.I.C. 2007-218, N.S. Reg. 220/2007.
(2) Where a plant is operating under minimum supervision, no power engineer or operator shall leave the plant site without ensuring that the plant is
(a) operating under automatic control safely and in accordance with the manufacturer’s specifications; and
(b) guarded.
(3) The power engineer or operator for every plant that is operating under minimum supervision shall visit the plant at least once during every 24-hour period to ensure that the requirements of Sections 17 to 22 respecting control, alarm and safety devices and systems and guarded controls are complied with.
16A(1) A refrigeration plant may be authorized to operate as an unsupervised plant under Section 12 if the plant meets all of the following:
(a) it has a self-contained system installed in accordance with CSA standard CSA B52-05, Mechanical Refrigeration Code, and the plant has a power rating of 350 kW or less;
(b) it is made up of centrifugal chillers that
(i) are used for air conditioning for the comfort of inhabitants and cool the air by circulating chilled water only, and
(ii) use a Group A1 or B1 refrigerant;
(c) it operates at a pressure of less than 103 kPa (15 psig).
(2) An unsupervised plant must operate in accordance with
(a) a maintenance procedure acceptable to the Inspector-Examiner; and
(b) the manufacturer’s specifications.
(3) An owner of an unsupervised plant must provide the name of the maintenance contractor to the Inspector-Examiner.
(4) An unsupervised plant must operate in compliance with CSA standard CSA B52-05, Mechanical Refrigeration Code.
Section 16A added: O.I.C. 2007-218, N.S. Reg. 220/2007.
Requirements for Guarded Plants
Maintenance schedule and testing
17 (1) Every owner, chief power engineer or chief operator of a guarded plant shall establish a maintenance schedule for the control, alarm and safety devices and systems and the guarded controls required by Sections 17 to 22 and shall maintain them in accordance with the maintenance schedule.
(2) Every owner, chief power engineer or chief operator of a guarded plant shall test and calibrate, in accordance with the manufacturer’s specifications, the control, alarm and safety devices and systems and the guarded controls required by Sections 17 to 22.
Technical requirements for guarded plants
18 (1) Every owner shall equip a guarded plant with
(a) an extended alarm system that is capable of initiating an alarm to a continuously attended monitoring system whenever the plant is operating; and
(b) an automatic control system that will safely operate the plant when the power engineer or operator in charge stops manually operating the controls.
(2) Every owner shall ensure that whenever an alarm signal is initiated by the extended alarm system, the power engineer or operator responsible for the plant is immediately notified by the person monitoring the system.
(3) Every owner shall equip every tripping device referred to in Sections 19 to 22 with a manual reset that is secured to prevent access by any person other than a power engineer or operator.
19 Every owner shall equip a guarded power boiler plant with
(a) a device that will purge the furnace chamber in accordance with the manufacturer’s specifications each time the boiler is put into use;
(b) a flame failure tripping device that will detect a flame failure and instantly stop and prevent the supply of fuel to the boiler if a flame failure occurs;
(c) a low water level tripping device, separate from any other device that controls the water level in the boiler during normal operation under automatic control, that will instantly stop and prevent the supply of fuel to the boiler if the boiler water falls below the safe operating level specified by the manufacturer;
(d) a high water level tripping device, separate from any other device that controls the water level of the boiler during normal operation under automatic control, that will instantly stop and prevent the supply of fuel to the boiler if the water in the boiler exceeds a safe operating level specified by the manufacturer;
(e) except where the manufacturer’s design does not include one, a low combustion air pressure tripping device that will instantly stop and prevent the supply of fuel to the boiler if the combustion air falls below the safe operating pressure specified by the manufacturer;
(f) a high pressure tripping device that will instantly stop and prevent the supply of fuel to the boiler, if the boiler pressure reaches the lower of
(i) the maximum allowable working pressure, or
(ii) an established high pressure limit specified by the manufacturer; and
(g) a “kill switch” device, mounted in a visible and readily accessible location outside the boiler room, that will allow a person to turn the boiler off safely in an emergency.
Guarded hot water heating boiler plant
20 Every owner shall equip a guarded high temperature, high pressure, hot water heating boiler plant with
(a) a high water temperature tripping device that will instantly stop and prevent the supply of fuel to the boiler when the water in the boiler exceeds the safe operating temperature specified by the manufacturer; and
(b) the devices referred to clauses 19(a), (b), (c), (e), (f) and (g).
21 (1) Every owner shall equip a guarded refrigeration plant with
(a) a high level liquid tripping device in the evaporator or the refrigerant suction accumulator, that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the liquid in the refrigerant level exceeds the safe level specified by the manufacturer, unless the design prevents the possibility of liquid refrigerant being drawn into the compressor;
(b) a high temperature tripping device, located in the coolant discharge line or in the discharge line of the compressor, that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the coolant or discharge gas exceeds the safe operating temperature specified by the manufacturer;
(c) a high discharge pressure tripping device that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the discharge of the compressor exceeds the safe operating pressure specified by the manufacturer;
(d) in the case of a pressurized lubricating oil system, a low oil pressure tripping device that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the oil falls below the safe operating pressure specified by the manufacturer;
(e) a “kill switch” device that is mounted in a visible and readily accessible location outside the compressor room that will allow a person to turn the compressor off safely in an emergency; and
(f) a machinery room as required by CSA standard CSA B52-05, Mechanical Refrigeration Code.
Clause 21(1)(f) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
(2) Every owner shall equip a guarded ammonia refrigeration system with an ammonia vapour detector that actuates at a value not greater than the TLV/TWA concentration value for ammonia as set out in CSA standard CSA B52-05, Mechanical Refrigeration Code.
Subsection 21(2) amended: O.I.C. 2007-218, N.S. Reg. 220/2007.
22 Every owner shall equip a guarded compressor plant with
(a) each of the devices described in clauses 21(1)(c), (d) and (e);
(b) a high discharge temperature tripping device in the discharge line of the compressor that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the discharge gas exceeds the safe operating temperature specified by the manufacturer;
(c) where the compressor is water-cooled,
(i) a low water pressure tripping device in the cooling water inlet line, or
(ii) a high water temperature tripping device in the cooling water outlet line
that will instantly stop the electric motor or prime mover of the compressor and prevent it from re-starting if the cooling water pressure or temperature is outside the safe operating pressure or temperature specified by the manufacturer;
(d) where the compressor is air-cooled, a fan motor overload tripping device that will instantly stop the electric motor or prime mover of the compressor and prevent it from restarting if the air cooling fan becomes overloaded; and
(e) where the compressor is driven by an electric motor, with a motor overload tripping device that stops the electric motor of the compressor and prevents it from re-starting if the motor becomes overloaded.
23 (1) Every owner shall provide a log book at each plant site.
(2) Every operator or power engineer in charge of a shift shall, for each shift, record in the log book the following information:
(a) the time, date and designation of the shift;
(b) the name and signature of the power engineer or operator providing the required supervision on each shift;
(c) the name of any other power engineer or operator on the shift;
(d) the name of the people on the shift who are in training to be power engineers or operators;
(e) the plant conditions;
(f) any abnormal plant conditions and any corrective actions required or taken;