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Do-It-Yourself (DIY) Question & Answer Forum
'Borrowed' Neutral in Grid switch
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<blockquote data-quote="Bob23" data-source="post: 507260" data-attributes="member: 33603"><p>Hi, Fairly new! have a question if I may?</p><p></p><p>New build house.. 1.5swa wired off ring main (13amp s/spur) to garage &gt; terminates at 20amp DP switch in garage.</p><p></p><p>garage has: lighting and power (interior/exterior light 1.0mm / 1x double socket.. actually wired in 2.5mm)</p><p></p><p>After the 20amp DP - Can I use a 3 plate grid switch (fuse unit for lighting, light for outside, light for inside) ? obviously the 13a socket will loop off the supply side of the fuse unit..</p><p></p><p>My concern is.. I'm joining the neutral of the lighting to the neutral off the sockets (I didn't realise the grid fuse wasn't double pole) however technically the grid is my 'garage consumer unit' with isolation on the 20amp DP in the garage, is this joining of the neutrals passable to current regs? I know it's not ideal but as long as it's a pass I'm happy.</p><p></p><p>Also, is wiring a garage in 2020 a thing with 1.5mm? or did plonkers build my house? I figured it was a standard 2.5mm feed from a 20a MCB into a 2-way consumer unit type of job??</p></blockquote><p></p>
[QUOTE="Bob23, post: 507260, member: 33603"] Hi, Fairly new! have a question if I may? New build house.. 1.5swa wired off ring main (13amp s/spur) to garage > terminates at 20amp DP switch in garage. garage has: lighting and power (interior/exterior light 1.0mm / 1x double socket.. actually wired in 2.5mm) After the 20amp DP - Can I use a 3 plate grid switch (fuse unit for lighting, light for outside, light for inside) ? obviously the 13a socket will loop off the supply side of the fuse unit.. My concern is.. I'm joining the neutral of the lighting to the neutral off the sockets (I didn't realise the grid fuse wasn't double pole) however technically the grid is my 'garage consumer unit' with isolation on the 20amp DP in the garage, is this joining of the neutrals passable to current regs? I know it's not ideal but as long as it's a pass I'm happy. Also, is wiring a garage in 2020 a thing with 1.5mm? or did plonkers build my house? I figured it was a standard 2.5mm feed from a 20a MCB into a 2-way consumer unit type of job?? [/QUOTE]
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'Borrowed' Neutral in Grid switch
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