Miscellaneous
Miscellaneous
An Example of Conduit
20mm conduit running externally from bathroom (boiler located in airing cupboard) to gas meter box (at bottom LHS of picture). Conduit contains 10mm gas bonding cable. Extractor fan was also installed (to the LHS of the black conduit terminal box). Note the right angle bends and the black conduit becoming white 20mm conduit at the junction of the brickwork with the white wood.
A Shower Distribution Board
Small 63A RCD board, with 40A MCB protection of shower circuit. Note the black service connector block on the RHS of the board. This enables the shower board to be installed separately from the (obsolete but safe) rewireable BS3671 fuse board, thereby mitigating
the necessity to interefere with the original house electrics. This work was done at my Mum & Dad's!
17th Edition Dual RCD Consumer Unit
The originial BS3671 consumer unit was replaced with this new, regulations-compliant board. New regulations mean that all domestic circuits require RCD protection with minimised nuisance tripping of the individual circuits. These new dual RCD boards neatly comply with this requirement by effectively splitting the circuits of the installation into, separately protected two halves.
Also note the metalclad switch coming off the board; this switch controls the customer's hot tub! The large black cable coming off from the small grey box is a steel wire armoured cable, feeding the hot tub. I have terminated it into an enclosure since I have found that direct termination into the board is not ideal, given the brittle nature of the plastic from which the board housing is built.
Switchfuse at Origin of Installation
This property had an obsolete board that the customer wanted to retain to reduce costs. However, the new extension consumer unit was 10m away from the meter. What to do? By installing a service connector block (the black block in the centre of the picture), the supply could be safely split, meaning the old consumer unit need not be touched. Then the main supply cable to the new consumer unit required protection, hence the installation of a 60A BS1361 main fuse and isolator (the small white box on the RHS of the picture).
Synaptica's 17th Edition Compliant Junction Box (JB)
constructed using Hellcon push-fit connectors!! THE OLD, BROWN, CIRCULAR, BAKERLITE JBs NO LONGER COMPLY WITH THE REGULATIONS!! This is because they consist of 4 screw terminals, with no capability of securely clamping the cables. The 17th Editions Wiring Regulations (BS7671) requires these types of JB to be accessible. UNDER FLOOR BOARDS IS NOT ACCESSIBLE, and maintenance-free terminations need to be made.
Using a Wiska box with Hellacon push-fit connectors and ampliversal glands, these requirements are met: the ampliversal glands allow a tight and secure claping of tghe cable, and the puchfit connectors are maintenance free (once on, they can't come off without cutting)
Moved a CH Timer & Fused Spur
Did exactly as it says in the title! Customer wanted them moved from under the cupboard as he was having the pipes boxed in. Job wasn't complicated, but you need your wits about you when you rewire a CH controller.
Moved a Lightswitch in a Primary School
Just an example of a small job, well done. It actually required a WISKA JB in the ceiling void to feed the 4 switches and the 4 banks of lights.
Installed an Electric Fire
Another example of a small job that needed to be done well. The socket is on the ring main, so can accomodate a fused spur to supply the fire.
17th Edition JBs for Downlighters
Downlighters require JBs to enable the cables and transformers to be adequately attached. These specially shaped JBs for downlighters from Ashley (Hager) enable all the 17th edition woring regulations to be met.