electric shower change over

kadelec said:

hi. Just a quick question. Got a job coming up which is just swapping a shower over. Old rewireable cu. Anyway the gas and water is earthed in 6mm earth. I'm upgrading main earth to 16mn . Do i need to upgrade these to 10mm? not if they show no signs of thermal damage and are intact.

and obviously put the current circuit on an rcd. yes

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skywalker100 said:

I believe a electric heated shower should not be on a rewireable.

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skywalker100 said:

Manufacturers recommendation. Mira have it down as not recommended because of inadequate short circuit capacity (see reg 433.1.3) and Triton have it down as DO NOT use a rewireable fuse.

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davesparks said:

Fine, but why do you believe it shouldn't be used?

It is perfectly possible to install a fully compliant installation which uses 3036 fuses for its ocpds

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Dave OCD said:

Come on Dave, you're hot on current electrical terminology so why use a method of protection that belongs in the past ? Would you really use a rewireable fuse to provide over current and short circuit protection on a shower circuit ?

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davesparks said:

On a new circuit no, but I see no reason to comment if an existing shower circuit uses a 3036 fuse for protection

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uksparks said:

If it was me I'd say no unless it was going on an RCD, I accept what you all have to say but I would just sleep a bit better thinking I'd put an rcd on it.

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