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pre loop in wiring
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<blockquote data-quote="ProDave" data-source="post: 261028" data-attributes="member: 6969"><p>that was known as the "spider system"</p><p></p><p>Every light and every switch was wired back to one big junction box where it was all connected together. Usually just one feed to the junction box for everything.</p><p></p><p>It was usual to have one such big junction box for each floor of a house. Which nicely explains why Landing lights so often have a borrowed neutral, as the get neutral from the upstairs JB but live comes from the downstairs JB via the two switches.</p><p></p><p>If you find an old house with a lighting fault, and find only 2 wires at the switch, and 2 wires at the light, then that's how it's wired.</p><p></p><p>Easy if it's an upstairs fault, it's usually easy to find the box in the loft (providing there's not too much junk) but when you need to find the big junction box for the downstairs, then it's guess which carpet to rip up looking for floorboards to lift.</p><p></p><p>These were mostly in the 60's. By the 80's and 90's 3 plating at the light was normal. Thought that's a regional thing. 3 plating at the switch is far more common up here, even on older houses, than it was darn sarf where I used to be.</p></blockquote><p></p>
[QUOTE="ProDave, post: 261028, member: 6969"] that was known as the "spider system" Every light and every switch was wired back to one big junction box where it was all connected together. Usually just one feed to the junction box for everything. It was usual to have one such big junction box for each floor of a house. Which nicely explains why Landing lights so often have a borrowed neutral, as the get neutral from the upstairs JB but live comes from the downstairs JB via the two switches. If you find an old house with a lighting fault, and find only 2 wires at the switch, and 2 wires at the light, then that's how it's wired. Easy if it's an upstairs fault, it's usually easy to find the box in the loft (providing there's not too much junk) but when you need to find the big junction box for the downstairs, then it's guess which carpet to rip up looking for floorboards to lift. These were mostly in the 60's. By the 80's and 90's 3 plating at the light was normal. Thought that's a regional thing. 3 plating at the switch is far more common up here, even on older houses, than it was darn sarf where I used to be. [/QUOTE]
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