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Wiring colours cable old electrical sheathing Wiring colours old colors label lights house blue mains diagram red regulations mean regulation potterton suprima edition brown regs older No lights on potterton suprima 30
No lights on Potterton Suprima 30 | DIYnot Forums
Electrical wiring colours
Electrical Wiring Colours - The Old and the New (UK) | EC4U
No lights on Potterton Suprima 30 | DIYnot Forums