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- 16 Nov 2006
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As part of my girlfriend's CU refurb she's getting her 60A main feed upgraded to 80A, so more current to feed into more toys
As she doesn't have any "easily tun on and offable" central heating (house used to have night storage heaters, now removed) she is thinking of buying up to three 1.2kW oil-filled panel heaters and making a semi-permanent installation out of them. While discussing this with a frend who is also doing up another house it was suggested that these could all be placed on a separate MCB in her nice, new CU.
What I'm wondering is just what would be the best way to have these wired into the CU? While indicidually thermostatically controlled, they will all be on timers, set to come on in the evening and early morning so to all intents and purposes they will all switch on at the same time. Total current draw will be about 16A, which suggests a 20A MCB.
The thing that's not clear is whether to get her sparky to wire these in as a radial circuit or as a ring, and whether the cable size would be different for either? I've had a look at the stuff on tlc-direct and it suggests that a 2.5mm^2 radial circuit with a 20A MCB is fine. The sparky popped in this morning to assess the work required for the CU replacement and we raised this with him and he said that he would reccomend doing it with a full ring using 6mm^ cable.
So on one hand we have a sparky saying do it one way and on the other hand I have a book saying it would be fine to do it another, so I'd appreciate your input.
As she doesn't have any "easily tun on and offable" central heating (house used to have night storage heaters, now removed) she is thinking of buying up to three 1.2kW oil-filled panel heaters and making a semi-permanent installation out of them. While discussing this with a frend who is also doing up another house it was suggested that these could all be placed on a separate MCB in her nice, new CU.
What I'm wondering is just what would be the best way to have these wired into the CU? While indicidually thermostatically controlled, they will all be on timers, set to come on in the evening and early morning so to all intents and purposes they will all switch on at the same time. Total current draw will be about 16A, which suggests a 20A MCB.
The thing that's not clear is whether to get her sparky to wire these in as a radial circuit or as a ring, and whether the cable size would be different for either? I've had a look at the stuff on tlc-direct and it suggests that a 2.5mm^2 radial circuit with a 20A MCB is fine. The sparky popped in this morning to assess the work required for the CU replacement and we raised this with him and he said that he would reccomend doing it with a full ring using 6mm^ cable.
So on one hand we have a sparky saying do it one way and on the other hand I have a book saying it would be fine to do it another, so I'd appreciate your input.