【法规名称】
【法规编号】 79755 什么是编号？
【正 文】
第2页 CAP 406E ELECTRICITY (WIRING) REGULATIONS
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[接上页] "safety source" (安全电源) means- (a) a double-insulated safety isolating transformer with its secondary winding being isolated from earth, and having a nominal output voltage not exceeding 55V; (b) a source of electricity providing a degree of safety equivalent to that of the safety isolating transformer referred to in paragraph (a) (for example, a motor- generator with windings providing equivalent isolation); or (c) a source providing electricity at a voltage not exceeding extra low voltage and independent of a higher voltage circuit;"substation" (电力分站) means premises or an enclosed part of premises that contains electrical equipment for transforming or converting energy to or from high voltage (other than transforming or converting energy solely for the operation of switching devices or instruments) or for switching, controlling or regulating energy at high voltage and that are large enough to admit the entrance of a person after the electrical equipment is in position; "switching" (开关) means making or breaking a current under normal circuit conditions; "switchroom" (开关房) means premises or an enclosed part of premises that contains electrical equipment for switching, controlling or regulating electricity at low voltage and above and that are large enough to admit the entrance of a person after the electrical equipment is in position. (Enacted 1990) Cap 406E reg 3 Application (1) These regulations apply to fixed electrical installations. (2) These regulations, except regulation 5(1), do not apply to a category 2 circuit. (Enacted 1990) Cap 406E reg 4 General safety requirements (1) Good workmanship and suitable materials shall be used. (2) A fixed electrical installation shall be designed, constructed, installed and protected so as to prevent danger. (3) Electrical equipment shall be installed so that it is capable of being identified, maintained, inspected and tested, where appropriate, so as to prevent danger. (4) Electrical equipment that requires operation, maintenance or attention shall be installed so as to provide adequate and safe means of access and working space. (5) The owner and person in control of a substation or switchroom shall ensure that unauthorized entry into his substation or switchroom is prevented. (6) The owner and person in control of premises in which a switchroom or substation is located shall ensure that their entrances and exits are kept clear of obstructions that could prevent easy access to the switchroom or substation. (7) A registered electrical worker shall ensure that safety precautions are taken to prevent danger arising from electrical wiring work done by him or under his supervision. (Enacted 1990) Cap 406E reg 5 Segregation of circuit categories (1) Category 1, 2, 3 and 4 circuits shall be segregated from one another as far as is necessary to prevent danger and electrical interference. (2) Category 4 circuits shall not be installed in the same conduit, ducting or trunking as circuits of other categories and shall be segregated from circuits of other categories at a distance sufficient to prevent danger and electrical interference with the circuits of those other categories. (Enacted 1990) Cap 406E reg 6 Circuit arrangement (1) A wiring installation shall be divided into as many circuits as are necessary in order to- (a) avoid danger in the event of a fault; and (b) facilitate safe operation, inspection, testing and maintenance.(2) A separate circuit shall be provided for each part of a wiring installation that needs to be separately controlled. (3) Where a wiring installation comprises more than one final circuit- (a) each final circuit shall be separately protected against overcurrent and connected to a separate isolation device in a distribution board; (b) the wiring of each final circuit shall be electrically separated from that of every other final circuit, so as to prevent indirect energisation of the final circuit intended to be isolated; and (c) each final circuit shall be designed so that it is not affected by the failure of any other final circuit. (Enacted 1990) Cap 406E reg 7 Current demand (1) A circuit shall be suitable for the maximum current demand of all current-using equipment that is connected or intended to be connected to the circuit when the current-using equipment is functioning in its intended manner. (2) The maximum current demand of a fixed electrical installation shall not exceed the approved loading. (Enacted 1990) Cap 406E reg 8 Isolation and switching (1) Effective means, readily accessible for operation, shall be provided so that all voltage may be cut off from every fixed installation, from each of its circuits and from all electrical equipment connected to each circuit, as may be necessary to prevent or remove danger. (2) Where motorised drives are involved with moving parts that are readily accessible and that may cause bodily injury, there shall be an effective means of disconnection locally placed for ready operation so that all voltage may be cut off from the motorised drives. |
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