I
IanRowlings
Hi
A friend has built a shower room and has asked if would do the electrics for him. I
have had some experience over the years but I'm not an electrician and would appreciate
some advice on a couple of things.
There's a 9W extractor fan and two 50W fire protected halogen downlighters to fit. The
ring main is in a convenient location so I had intended to take a 2.5mm cable from this
junction to a 13A (3A induction) fused, 30mA, double pole RCD and connect this to a
double pole fan isolator switch (both outside the room). I would then take a 1.5mm
cable from the switch to the fan and then onto the 2 light in series. Does this appear
to be OK, or should I take 2 cables from the switch to the fan and lights seperately?
He also wants to fit a 2-gang 115/230V shaver socket with integral transformer. There
are 3 ways to fit this that I would consider:
1. I could take the feed from the same ring main junction direct to the shaver unit so
that it permanently live. Although, even though the ring is RCD protected, I'm not sure
if this would be adequate protection.
2. As with the setup for the fan and lights, I could take an additinal feed from the
fan isolator switch to the shaver socket so that it switched with the fan and lights. I
don't think the power consumtion of all 3 items would be too great for the RCD or
switch. However, I have read that a fuse rating much less than 13A should be used with
these shaver sockets, so my concern here is that the 13A RCD would not provide suitable
protection.
3. I could take an additinal feed from the same ring junction to a new DP RCD and
switch and feed the shaver socket from these. If this option is preferable what rating
of RCD should be used?
Finally, should I use 1.5 or 2.5mm cable to feed the shaver untit?
Any advice would be much appreciated. Thanks.
A friend has built a shower room and has asked if would do the electrics for him. I
have had some experience over the years but I'm not an electrician and would appreciate
some advice on a couple of things.
There's a 9W extractor fan and two 50W fire protected halogen downlighters to fit. The
ring main is in a convenient location so I had intended to take a 2.5mm cable from this
junction to a 13A (3A induction) fused, 30mA, double pole RCD and connect this to a
double pole fan isolator switch (both outside the room). I would then take a 1.5mm
cable from the switch to the fan and then onto the 2 light in series. Does this appear
to be OK, or should I take 2 cables from the switch to the fan and lights seperately?
He also wants to fit a 2-gang 115/230V shaver socket with integral transformer. There
are 3 ways to fit this that I would consider:
1. I could take the feed from the same ring main junction direct to the shaver unit so
that it permanently live. Although, even though the ring is RCD protected, I'm not sure
if this would be adequate protection.
2. As with the setup for the fan and lights, I could take an additinal feed from the
fan isolator switch to the shaver socket so that it switched with the fan and lights. I
don't think the power consumtion of all 3 items would be too great for the RCD or
switch. However, I have read that a fuse rating much less than 13A should be used with
these shaver sockets, so my concern here is that the 13A RCD would not provide suitable
protection.
3. I could take an additinal feed from the same ring junction to a new DP RCD and
switch and feed the shaver socket from these. If this option is preferable what rating
of RCD should be used?
Finally, should I use 1.5 or 2.5mm cable to feed the shaver untit?
Any advice would be much appreciated. Thanks.
