Final part of connecting Shower!!

[jonboy1970]

Hi!
Can i fit the 7.5 mm cable with unsheathed earth built in ,directly behind the shower control unit through the wall directly to the 45 amp doublepole switch?
The switch is located on the opposite side of the wall in the airing cupboard to which where the shower is located.
I intend to drill directly behind the shower contol unit through the wall.So no cable will be exposed in the bathroom. Is this ok?

As for the rest of the fitting,fuse box wiring from the metal switch box,has been carried out professionally.
And the plumbing has been completed
For the record,its a Gainsborough RE 600

Any Advice is appriaciated.

 

[Steve]

7.5mm cable?

what dimension is this? do you know its actual cross section area?

Is it twin and earth?



This work is notifiable to your local council's building control under part p. Have a read here: http://wiki.diynot.com/electrics:part_p:diy_electrical_work_and_the_law

I recommend you get an electrician in, since he will probably charge less than the building control fee.

 

[Taylortwocities]

The RE600 is an 8.5KW shower so I do hope you have 10mm cable running all the way from your fuseboard?

TLC

 

[jonboy1970]

Thanx for getting back quickly guyz..
As this is the final part of the installation ill just inform you that all the rest of the work was carried out professionally.
The cable running up to the switch box from the fuse box looks thicker and bigger than 10mm.
The 7.5mm cable im reffering to is the same type as you would expect to find on and electric cooker so a insulated black wire and a red insulated cable...with a unsulated cable runing inside between the two.
As i say just a basic cable.

 

[sparky40]

We need to know the size of the cable, as 7.5 is not a recognised size cable.
Is it not written on the outer insulation ??
The drum it came on ?
The receipt ??

6, 10, 16mm ?

You may have 16mm from the consumer unit and 10mm from the DP isolator to the shower unit.

 

[Steve]

You may have 16mm from the consumer unit and 10mm from the DP isolator to the shower unit.

Or he might have 6mm² all the way

 

[sparky40]

He may, indeed.

 

[securespark]

You can run an 8.5 on 6mm2...

I'm running a 9.5 on 6mm2 at home as an experiment, under controlled installation conditions. The cable is not overheating, and the current draw is 41.32A. circuit length 14.58m.

 

[dingbat]

The cable is not overheating, and the current draw is 41.32A.

I bet it's not, as your 9.5kW shower is only 9.5kW at 240V, giving a current of 39.6A. At 230V the shower will only be rated at 8.7kW (= 37.8A) which is generally good news.

If it's Installation Method 1 all the way I see no problems with that.

 

[Pensdown]

You can run an 8.5 on 6mm2...

I'm running a 9.5 on 6mm2 at home as an experiment, under controlled installation conditions.

 

[securespark]

The shower is 1 all the way. Where the cable runs through the loft, it is well away from fibreglass. It is also protected by an RCD and a 40A breaker, so if there were any overheating, the protection should kick in. I remember a shower circuit I wired 10 years ago, and the RCD kept tripping because of a build-up of heat in the cable.

Dingbat

That's what the clamp told me!!

 

[dingbat]

Dingbat

That's what the clamp told me!!

Of course it was!

 

[Pensdown]

Every sparks I've met seems to be doing "an experiment under controlled installation conditions" when it comes down to their own house, me included.

 

[RF Lighting]

Personally I am conducting an experiment to see how old my wiring needs to be before it fails.

Currently upto 47 years and still going.....

 

[securespark]

Sizzle, crackle......have you got it all on a global RCD?