Extractor Fan help

Simonslimline · Mar 9, 2015

telectrix said:
irrevelant. what's more to the point is what is this northern barbarian ( pennychew) doing coming down to rape archy's cattle and rustle manchester women?

So is a cpc required in an installation/circuit that relies on double or reinforced insulation for both basic and fault protection?

Bobster · Mar 9, 2015

Think about where you might have seen a circuit without a 'cpc'.

As a second year app I'm guessing you've probably seen a few.

Simonslimline · Mar 9, 2015

Rob said:
Think about where you might have seen a circuit without a 'cpc'.

As a second year app I'm guessing you've probably seen a few.

Only some lighting circuits in older installations spring to mind.

Bobster · Mar 9, 2015

That was allowed at one point. Not anymore.

Maybe im being mean as you could argue the immediate circuit I'm thinking off falls outside of 7671.

Silly Sausage · Mar 9, 2015

Simonslimline said:
So is a cpc required in an installation/circuit that relies on double or reinforced insulation for both basic and fault protection?

You could have Class 2 equipment that doesn't require an Earth, but .........
Or you could have a circuit which doesn't require a CPC, which would be ...?
Also, find the reg about taking a CPC to every point.

Simonslimline · Mar 9, 2015

Rob said:
That was allowed at one point. Not anymore.

Maybe im being mean as you could argue the immediate circuit I'm thinking off falls outside of 7671.

Im a bit lost now

Bobster · Mar 9, 2015

Dno...

pennychew · Mar 9, 2015

Rob said:
Dno...

Neither do I!

pennychew · Mar 9, 2015

I was thinking of a tt supply when you first commented

Simonslimline · Mar 9, 2015

Rob said:
Dno...

A distribution circuit with pen condcutor then I guess. So this would come under ESQCR?

Simonslimline · Mar 9, 2015

Archy Styrigg said:
You could have Class 2 equipment that doesn't require an Earth, but .........411.3.1.1 still applies.
Or you could have a circuit which doesn't require a CPC, which would be ...? This is where im slightly confused.
Also, find the reg about taking a CPC to every point 411.3.1.1.

See bold text

pennychew · Mar 9, 2015

If that dog hadn't ate that van with my regs book in I'd have nailed this one by now

Silly Sausage · Mar 9, 2015

Or you could have a circuit which doesn't require a CPC, which would be ...? This is where im slightly confused.

Hint...Voltage bands!

Simonslimline · Mar 9, 2015

Archy Styrigg said:
Hint...Voltage bands!

So ELV then.

happysteve · Mar 9, 2015

Simonslimline said:
So is a cpc required in an installation/circuit that relies on double or reinforced insulation for both basic and fault protection?

Good question.

Depends whether it's under effective supervision or not:

Relevant regs: section 412, specifically 412.1.3 and 412.2.3.2.

I was wondering about the protective measure of electrical separation. Let's say for argument's sake, limited to the supply of one item of current-using equipment supplied from one unearthed source with simple separation (413.1.2). Reg 413.3.5 seems to imply that no CPC is needed. I'm not sure what value a CPC would have where electrical separation is used as the method of fault protection.

If you're looking for the reg that says you have to run a CPC everywhere*, then have a butchers at 411.3.1.1 <--- EDIT: I see this was answered in the time it took me to write all this.

* almost everywhere. Lampholders having no exposed-conductive-part hold a special place in our hearts...