I'm rewiring the house and whilst most socket outlets will be on the RCD
side of the split load CU, there are one or two things I don't want
protected by the RCD so I intend making use of a radial circuit for these.

I've used a 20A MCB and I've run 2.5mm T&E to a single socket on one kitchen
wall for the fridge, then over to the opposite wall for a single socket for
the freezer. I've then taken it up into the loft to an FCU (fused at 3A)
feeding the boiler and a single socket feeding a TV distribution amplifier -
a total run of approximately 17 metres.

My question is, can I extend it a further 3 meters to drop down into the
bathroom and feed a fan heater, such as this one:

http://www.tlc-direct.co.uk/Products/DXFX20V.html

At 2kW, that would be the highest rated load and it would be right at the
end of the cable run so would this be OK?

Cheers,

John.

On 1 Feb, 15:41, "John" wrote:
I'm rewiring the house and whilst most socket outlets will be on the RCD
side of the split load CU, there are one or two things I don't want
protected by the RCD so I intend making use of a radial circuit for these.

I've used a 20A MCB and I've run 2.5mm T&E to a single socket on one kitchen
wall for the fridge, then over to the opposite wall for a single socket for
the freezer. I've then taken it up into the loft to an FCU (fused at 3A)
feeding the boiler and a single socket feeding a TV distribution amplifier -
a total run of approximately 17 metres.

My question is, can I extend it a further 3 meters to drop down into the
bathroom and feed a fan heater, such as this one:

http://www.tlc-direct.co.uk/Products/DXFX20V.html

At 2kW, that would be the highest rated load and it would be right at the
end of the cable run so would this be OK?

Cheers,

John.

Should be fine. Max length for a 20A MCB fed radial in 2.5mm is 33m.
This assumes there is no derating due to running through insulation or
bunching with other cable. As a socket circuit it is assumed that you
might plug anything in at any point so the standard circuit should
cover for this. I got the length from another web-forum (careful
searching) but will check in the OSG tonight. It will be somewhere in
Table 7.1 (I think that's the one).

Alternatively someone who has learnt the OSG by rote may be able to
confirm quicker than this.

Fash

On 1 Feb, 17:41, "Fash" wrote:
On 1 Feb, 15:41, "John" wrote:





I'm rewiring the house and whilst most socket outlets will be on the RCD
side of the split load CU, there are one or two things I don't want
protected by the RCD so I intend making use of a radial circuit for these.

I've used a 20A MCB and I've run 2.5mm T&E to a single socket on one kitchen
wall for the fridge, then over to the opposite wall for a single socket for
the freezer. I've then taken it up into the loft to an FCU (fused at 3A)
feeding the boiler and a single socket feeding a TV distribution amplifier -
a total run of approximately 17 metres.

My question is, can I extend it a further 3 meters to drop down into the
bathroom and feed a fan heater, such as this one:

http://www.tlc-direct.co.uk/Products/DXFX20V.html

At 2kW, that would be the highest rated load and it would be right at the
end of the cable run so would this be OK?

Cheers,

John.

Should be fine. Max length for a 20A MCB fed radial in 2.5mm is 33m.
This assumes there is no derating due to running through insulation or
bunching with other cable. As a socket circuit it is assumed that you
might plug anything in at any point so the standard circuit should
cover for this. I got the length from another web-forum (careful
searching) but will check in the OSG tonight. It will be somewhere in
Table 7.1 (I think that's the one).

Alternatively someone who has learnt the OSG by rote may be able to
confirm quicker than this.

Fash- Hide quoted text -

- Show quoted text -

Forgot to add there is also the caveat about only supplying a 20sqm
area in total. You should be OK on this. You may want to check that
you aren't likely to end up pulling more than the rated 20A if
everything is going though.

Fash

"Fash" wrote in message
oups.com...
On 1 Feb, 17:41, "Fash" wrote:
On 1 Feb, 15:41, "John" wrote:





I'm rewiring the house and whilst most socket outlets will be on the
RCD
side of the split load CU, there are one or two things I don't want
protected by the RCD so I intend making use of a radial circuit for
these.

I've used a 20A MCB and I've run 2.5mm T&E to a single socket on one
kitchen
wall for the fridge, then over to the opposite wall for a single socket
for
the freezer. I've then taken it up into the loft to an FCU (fused at
3A)
feeding the boiler and a single socket feeding a TV distribution
amplifier -
a total run of approximately 17 metres.

My question is, can I extend it a further 3 meters to drop down into
the
bathroom and feed a fan heater, such as this one:

http://www.tlc-direct.co.uk/Products/DXFX20V.html

At 2kW, that would be the highest rated load and it would be right at
the
end of the cable run so would this be OK?

Cheers,

John.

Should be fine. Max length for a 20A MCB fed radial in 2.5mm is 33m.
This assumes there is no derating due to running through insulation or
bunching with other cable. As a socket circuit it is assumed that you
might plug anything in at any point so the standard circuit should
cover for this. I got the length from another web-forum (careful
searching) but will check in the OSG tonight. It will be somewhere in
Table 7.1 (I think that's the one).

Alternatively someone who has learnt the OSG by rote may be able to
confirm quicker than this.

Fash- Hide quoted text -

- Show quoted text -

Forgot to add there is also the caveat about only supplying a 20sqm
area in total. You should be OK on this. You may want to check that
you aren't likely to end up pulling more than the rated 20A if
everything is going though.

Fash

Thanks Fash, all noted.

John.