Have I got this right?

[Tucosweep]

Grant, are you actually an electrician? Also, this work is notifiable under part P (either before you commence work if not registered, or after completion if you are).
I only bring up these points due to the fact that you bought the 6mm cable without being sure, and stated that you were considering running cable you rated at 38A with 40A protection.

Im a qualified domestic installer and trainee electrician.
I want to use this job as one of my NIC inspections.
(Where are all the electrical mentors)

The 6mm cable would of been ok if clipped direct but this is a ground floor flat with no loft.

Thanks for all the input peeps

 

[Des 56]

Hi,
Yes, I have been a bit slow on this one.
i have stupidly bought 6mm cable, is there a way round it?
can I strip the cores into singles to give me a CCC of 41A then sleeve the earth?
kind regards
Grant

There is another thread where you could include that suggestion

 

[Guitarist]

Im a qualified domestic installer and trainee electrician.
I want to use this job as one of my NIC inspections.
(Where are all the electrical mentors)

The 6mm cable would of been ok if clipped direct but this is a ground floor flat with no loft.

Thanks for all the input peeps

Don't quite understand that. Qualified DI, but only a trainee electrician. In my day you were either a qualified electricain, or a trainee.... How times have changed.
I take it you are signing it off and notifying it then?

 

[Guest55]

10mm for a 8.5kw domestic shower ? the worlds gone mad.

tin hat on!

i've got armour piercing rounds.
;-D

 

[Tomhw100]

never install 6mm for showers now like people have said 10mm all day long and saves the hassle when they inevitably want a new higher kw shower.

 

[rmc86uk]

Nah mate 6mm cable pal it can easily carry the current what the shower will pull and your not even going to have it on full heat which will probably scald you if it was!

I could have easily ran in 10mm on a job a month back but why would I do that when I had some 6mm already in the garage and it was easy big enough for the job intended!

 

[telectrix]

next thing is they'll want 16mm on the buggers. mad.

 

[Guest55]

next thing is they'll want 16mm on the buggers. mad.

good luck wiring the pull cord.
you'll need a 2 ft back box lol.

 

[oldtimer]

your CCC at 38A would require a 32A MCB ( In < Iz ). a 32A MCB ain't gonna trip on 8.5kW for the length of time the shower is on. calc. current is 36A but i bet a clamp meter will show a bit less.

Of course it will show lower cos I aint seen 230volts or for that matter anything under 240v lol

 

[jamie-spark]

Hello guys,
I am wiring a shower and need to know if I have got this right?

It is a 8.5kw shower with a 15m cable run in mini trunking.

I have selected a 40A mcb, 6mm cable with a current capacity of 38A, and the volt drop is just inside.

BUT, after looking in the electricians guide to the wiring regs it says I must have 10mm cable for a shower rated between 7.5-9.5kw,

can I proceed with the 6mm cable?

kind regards
Grant

6mm cable may be suitable as , It (current-carrying capacity) is greater than Ib ( design current for shower)
The shower is a fixed load and will not overload but fault protection is still required see reg 433.3.10

 

[Guitarist]

Nah mate 6mm cable pal it can easily carry the current what the shower will pull and your not even going to have it on full heat which will probably scald you if it was!

I could have easily ran in 10mm on a job a month back but why would I do that when I had some 6mm already in the garage and it was easy big enough for the job intended!

Fixed load mate (unless you set it on "economy", which some showers have). So when you turn it down, it simply increases flow rate, it doesn't use less power.

 

[rmc86uk]

Still adequate for the job intended though!

 

[jmtisme]

Fixed load mate (unless you set it on "economy", which some showers have). So when you turn it down, it simply increases flow rate, it doesn't use less power.

Was about to point htis out myself