October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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Lighting fittings 49
looping cables should be carefully twisted together, and single wires bent over
double to ensure a good connection.
If a break ring or pattress block is to be used, it is passed over the cables at
this stage, any knockouts being carefully removed and rough edges smoothed
down. Deep pattress blocks, with tapped fixings for the rose, are screwed
directly to the joist or bearer board, through the ceiling plaster or ceiling
board.
With the integral-base type of rose, cables are passed through the back
knockout and the bare ends pushed through the appropriate terminal sleeves
or blocks so that approximately
3
mm protrudes, an ...
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