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Looked at a very tidily done caravan site metre room today and noticed that the metal-enclosed fused isolators all had the phase and neutral tails entering and exiting the metal enclosures through seperate k.o.s (no slots inbetween). Otherwise, the installation looked remarkably well installed...

Just found this response to a similar question on another forum: "I have found an old GEC type T catalogue.A BS88 PART 2 35A fuse rated up to 660v has a max Zs of 1.55 ohms.They also produced a motor rated 32M35. ... "

35A, yes. I know they were about some time back (industrial use?) but dont see much of 'em now.

Hello folks, Found a BS88 35A (20kA breaking capacity) being used on a shower circuit in a house but there aren't any loop impedance readings in the regs to check against. I didn't see any info regarding type on the fuse. Can they be used in domestic C.U.s & if so where do I find the max loop...

Thanks for your replies. No tests have been done yet as I just had a quick glance at it today. Would it be unusual or indeed unacceptable to have rods on a TNS system?

Hello folks. Sorry for the quality of the picture but looking at it I can't decide if this supply is TT or TNS. It's definately not TNCS (which is good as it's a static caravan site). As you can see, there's what appears to be an earth rod going into the ground which is also connected to the...

Yep...seems it's all about the advice given on this thread: //www.diynot.com/forums/viewtopic.php?t=143534&sid=a317e269bee72fcaac0220de23f19194 ...but I can't be bothered reading through it all. Personally I get great advice off both forums so it's a shame we've got a handbags...

Just seen this thread. I'm with napit and am just going to check out the forum now......

Hey thanks for the help everyone. I'll do some investigating.

Hiya Chris, thanks for replying. Unfortunately I can't open the links. Also I've no idea what system I've got I'm afraid! Electricity I'm okay with; boilers not a scooby! How would I find out what kind of motorised valve I had?

Hello folks, I'm usually in the electrical section but nipped over here to see if you can help me with something. I've got an old boiler in my house (queue the wife jokes), which is a Baxi FS501OF (it also has FS501SOF on it). Coming from the LP722 control panel there are three white cables...

Just pricing up a light industrial job. It's to install a bank of sockets in a warehouse that calibrates measuring instrumentation and the customer doesn't want r.c.d. protection in case of nuisance tripping. The warehouse doors are about 8 mts away and so the sockets could reasonably be used to...

Sorry BAN, missed the tweek I was busy. Yep that's the fella.

Would replacing the m.c.b.s on the non-r.c.d. protected side of a split load c.u. with r.c.b.o.s (and some re-configuring of the order of circuits) meet the 17th standard? Not necessarily the cheapest option, I know, but it's the one method I rarely see mentioned and I wondered if there was...

Are there actually any specific regulations regarding the need for local isolation of a shower and fan in a bathroom? I did a p.i.r. yesterday on an apartment and noted there was no isolator (other than the m.c.b.) for the shower and none for the bathroom fan. I'm typing the report up today...

Does the "Danger - 240 Volts" sticker come as standard on the 17th C.U.s or have you added it? Is a new requirement?

Thanks for that Securespark; good idea about the splitting the 16!