A common installation method I saw a lot of as an apprentice was for wiring a machine shop , say . Can't seem to find it under " Installation Method A /B /C etc.
A trunking , lid up , laid on the roof purlins with four cables , TPN ( 3 reds +black ) size either 7/.064 or 19/.052 ( 16mm or 25mm ) Usually fused at 60A or 100A rewirable .
Where a machine drop was required a steel conduit installed down to a sw/fuse fitted to the machine . Wired in most cases with three x 3/.036 (4mm) reds , ( Earthing via trunk/conduit ) . Conduit could be hanging in free air from above , finishing with flexi-con .
The 4mms in the trunking would be connected to the downshop cables with line - taps . So , cut a one inch section of insulation off the 25mm , fit a line-tap over it , poke in the end of your 4mm & tighten up . Often carried out live . Check the machine for direction & move on .
A trunking , lid up , laid on the roof purlins with four cables , TPN ( 3 reds +black ) size either 7/.064 or 19/.052 ( 16mm or 25mm ) Usually fused at 60A or 100A rewirable .
Where a machine drop was required a steel conduit installed down to a sw/fuse fitted to the machine . Wired in most cases with three x 3/.036 (4mm) reds , ( Earthing via trunk/conduit ) . Conduit could be hanging in free air from above , finishing with flexi-con .
The 4mms in the trunking would be connected to the downshop cables with line - taps . So , cut a one inch section of insulation off the 25mm , fit a line-tap over it , poke in the end of your 4mm & tighten up . Often carried out live . Check the machine for direction & move on .
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