General requirements

15232 Main and Sub Distribution Boards

The Contractor shall supply and install distribution boards in the positions indicated on the drawings. All sub-main distribution boards shall be complete with isolator or fused switch as applicable.

The distribution boards shall be complete with all necessary earth bonding gland-plates, cable entries, fixing brackets and supports for the cables specified and the locations indicated.

Sub-distribution boards shall be surface/flush mounted as specified in the Bill.

Distribution boards shall be of the type fully enclosed sheet steel cabinets and hinged cover. Each shall be a one standard panel section having the number of pitch units as detailed in the drawings. Boards shall consist of approved single and triple pole miniature circuit breakers. The current rating and type of each panel are indicated on the appropriate distribution boards diagram.
Unused reserve pitch units shall be fitted with molded plastic cover strips. Full facilities shall be provided within the panel for the fitting of future additional circuit breakers. The circuits fed from the distribution board shall be marked on a card fixed to the inside of the lid. This card must indicate without ambiguity the location of all the outlets fed from each distribution way, and the size of the fuse of circuit breaker rating. The information must either be typed or printed on the card, or presented in similar legible manners.

Distribution and sub-distribution boards, bus bar rating, type of mounting (surface, flush), etc. shall be indicated in the drawing. The reference number of the Board shall be used in the Bill.

Distribution boards shall be enumerated and understood as including all related works.
15233 Terminal covers shall be of molded plastic; surfaces mounted with bare plate, 35mm wide rail and wire entry knockouts. Terminal covers shall include all related work. Terminal covers shall be enumerated with reference to the number in the drawing.