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What would your take be? A 25mm three core (32mm dia) is run through a stud partition, so cable cannot be < 50mm from surface. Is SWA of the cable sufficient protection, or should additional armour be provided?

An extension of a heating system requires the flow and return to be connected BEFORE a three port control valve (similar to a by pass). The extension needs therefore to be controlled by its own two port zone valve. Where should the CH demand signal be taken from? At first site the white...