Busbars Sample Clauses

Busbars. ( wherever applicable) Phase and neutral copper busbars shall be provided at the top for the entire length of the lighting/power distribution board. The busbars support shall be epoxy material (non-hygroscopic anti tracking material).
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Busbars. The three phase busbars shall be rated for a 1250A minimum continuous current.
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Busbars. Busbars are to be installed for each phase and the neutral in all distribution kiosks and may be installed either horizontally or vertically. Bus bar sizes must comply with the load requirements for the relevant kiosks. Busbars shall each be identified by means of shrunk PVC or painted phase colouring bands.
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Busbars. See Section C15 for details
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Busbars. Material of busbars Cu
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Busbars. Unless otherwise approved, shall be of electrolytic copper in the form of circular section rod or rectangular section strip. All conductors shall be kept as short and straight as possible and be adequately supported so as to prevent deflection, under rated short circuit conditions. Each phase conductor of the primary Busbars, including all through joints and tapping connections shall be spaced at such intervals to give the necessary clearance for the voltage rating. Primary Busbars, connections and their supports shall be of an approved type and shall be capable of carrying the short-time current associated with their short-circuit ratings for a period of 3 seconds. Where busbar supports etc., use insulation of moulded or resin bonded material it shall have a durable anti-hygroscopic surface finish with high anti-tracking properties. The connections from Busbars in individual units shall have a continuous current rating of not less than that of the equipment comprising the unit. At all points where connections or joints occur, the Busbars and connecting pieces shall be tinned or silver-plated. The resistance of any length of conductor containing a joint shall not be greater than that of an equal length without a joint. Clamps, where used, shall be phosphor bronze and all bolts for joints shall be of high tensile steel. Primary Busbars and connections shall be clearly marked and shall be displaced for standard phase sequence Red (R), Yellow (Y), and Blue (B) or equivalent counting from front to rear, top to bottom or left to right as viewed from the switching device operating mechanism side. Busbars shall be readily extensible and on duplicate busbar equipment without shut-down of the complete switchboard or without taking existing circuits out of service. The general construction and layout of the Busbars, connections and supports shall be to the Engineers’ approval.
Sample 1
Busbars. Busbars shall be installed in all distribution boards and may run either horizontally or vertically All terminations onto busbars and busbar interconnections shall be bolted with cadmium-plated high tensile bolts, washers, spring washers and nuts. Busbars shall be mounted on substantial porcelain or other approved insulators. Bare conductors shall be so spaced that with all clamps, lugs and lead-off in position, the spacing between any conductor and earth shall not be less than 40mm. Busbars, spacing between busbars and connections thereto shall comply with SANS 1195: 2007 Connections to the busbars shall be effected by means of the correct clamps or lugs with soldered connections or with connections crimped with the correct equipment. The following colours shall be used: NUMBER OF PHASES PHASE COLOUR NEUTRAL COLOUR SPECIAL PURPOSE COLOUR 1. Red Black Green / Yellow Orange 2. Red and White Black Green / Yellow Orange 3. Red, white and blue Black Green / Yellow Orange Where busbars are mounted horizontally the longer dimensions shall be designed to withstand the mechanical and thermal stresses of any possible short circuit that could occur at that point in the system. Busbars shall be high purity, hard-drawn tinned copper only, of adequate size such that the current density of the busbars shall not exceed 1,5A/mm². Neutral busbar shall have the same cross-section as phase bars. The current carrying capacity of the busbars shall in all instances not less than the current carrying capacity of the main isolator specified for the distribution board. Busbars shall be pre-drilled to allow 25% future connections. The busbars and any insulated connection busbars shall be sleeved with heat shrink type material by the manufacturers of the board over their entire length, except at joints. Colour coding of the busbars shall be strictly observed.
Sample 1
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Related to Busbars

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