FP200 two core used as a lighting circuit

[sprocketflup]

Hi all, was looking for some advice on FP200 as Ive never used it before and we had about 10minutes on it in college lol

Im currently tiling a bathroom for a lady and she asked me today if Id replace the light fitting please, and gave me a B&Q light fitting. "No problem" says I

When I unscrewed the old fitting, I noticed 2 black cores (one red sleeved) which piqued my curiosity. A quick jaunt into the loft showed me that all the upstairs light circuits are wired in FP200 (thatched roof)

What Id like to know is what to do with the earth. The previous fitting had a fly lead back to the metal conduit box that the FP200 is terminated into, does the fire proof cable use its sheave/armour as an earth? Or should I get the lady to take the fitting back and buy a Class 1 fitting?

Thanks

 

[Ian Speirs]

FP 200 in my experience has always had an un insulated cpc, as with twin and earth. Has someone perhaps cut the cpc short and not terminated it? You can't use the shield as a cpc, although it will become earthed when the cpc is used as it is in contact with it.

 

[Barx]

I would say that micc, not fp

 

[Ian Speirs]

Just re read op and it does sound like pyro.

 

[steptoe]

yep, are you sure its FP and not MIMMS as its now called? [i think] , still pyro to me though.

 

[Ian Speirs]

Also, as long as the earth is sufficiant for the circuit, then a class 1 or 2 light fitting is fine, as long as it is suitable for its zone.

---------- Post Auto-Merged at 20:23 ---------- Previous post was made at 20:21 ----------

yep, are you sure its FP and not MIMMS as its now called? [i think] , still pyro to me though.

Yeah MIMS ( Mineral Insulated Metal Sheathed), Still Pyro tho.

 

[sprocketflup]

You know, now I come to think about it, I think it is pyro. I didnt think to pull the shroud back and look.... it has a red plastic outer coating. Not a flexible cable but could be bent with a bit of force?

Does pyro use its shield as an earth?

 

[Ian Speirs]

Does pyro use its shield as an earth?

Yes, it does.

 

[Evans Electric]

Yes it does.

It sounds like pyro because of the two black cores , FP is always R&B or BRo & Bu .

The sheath is the earth with pyro , you should be able to connect a jumper earth wire from the box .

Sounds like someone had Red/PVC pyro left over as that was usually for Fire Alarms and Orange/PVC for mains.

 

[Barx]

Who said it was red?

 

[sprocketflup]

The place is properly fire proofed out, when I took the loft hatch down it nearly broke my arm because i hadnt realised it was made from that heavy fireproof stuff

Thanks all for the help

---------- Post Auto-Merged at 20:49 ---------- Previous post was made at 20:47 ----------

Who said it was red?

I did, in post #7.

keep your knickers on

 

[Barx]

The place is properly fire proofed out, when I took the loft hatch down it nearly broke my arm because i hadnt realised it was made from that heavy fireproof stuff Thanks all for the help

---------- Post Auto-Merged at 20:49 ---------- Previous post was made at 20:47 ----------

I did, in post #7.

keep your knickers on

Is this a wind up?

 

[steptoe]

well, keep the wifes knickers on then!

Is this a wind up?

:slap

 

[Robin Spark]

well, keep the wifes knickers on then! :slap

I dunno, but best be protected in that thatched area!

 

[Badger]

yep, are you sure its FP and not MIMMS as its now called? [i think] , still pyro to me though.

MICC in my day (mineral insulated copper cable)

:slap

 

[SLIPSHOD & SLAPDASH]

MICC in my day (mineral insulated copper cable) :slap

Actually its Mineral insulated copper clad, cable. Pedanticness over

 

[Doc Hudson]

You know, now I come to think about it, I think it is pyro. I didnt think to pull the shroud back and look.... it has a red plastic outer coating. Not a flexible cable but could be bent with a bit of force? Does pyro use its shield as an earth?

. A quick jaunt into the loft showed me that all the upstairs light circuits are wired in FP200 (thatched roof) Thanks

I think the thatched roof aspect may have some insurance stipulations governing what electric cables are allowed to be use in sections of the property. Pyro (MICC) would certainly be good at withstanding high current short circuit faults with less risk of the cable setting the thatch on fire.

Doc H.

 

[needasparks]

Hi guys, first post on this site but reading with interest.

Would agree with doc above, it most certainly would be included within the insurance as a method of installation. I guess some of you don't read GN1 (selection and erection) with regards to damage from fauna and flora. There is also the wiring within a combustible building to consider. The property may also have additional restrictions or exclusions on electrical alterations included either from local council (grade listing) or insurance so best to check before installing/altering anything.