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Thanks for your advice, guys. Very helpful.

Spark123: I think the pipework is standard 15mm copper tube. Will have to check as the house is some distance from here. The drain is definitely plastic all the way back to the gully. Bernard: That makes sense. Evidence of a fault in the supply is growing. Like a twit, I didn't take DC...

Here's a strange one for you geniuses. My brother has a house near the shoreline. Some people have complained they get a shock from the kitchen sink, especially when they've come in from the beach in wet flip-flops or bare feet. I put a sensitive voltmeter between the sink and a damp...

Yup, all is clear. In a garage unit the RCD acts as the incoming isolator for both circuits, right? I was just wondering what would be wrong with a CU made of - 2 pole switched isolator - Power circuit with MCB and RCD - Lighting circuit with MCB only which would, I guess, be more...

Thanks, JohnD. Yes, the house has an old fusewire box which I've long been meaning to get replaced. No, I wouldn't dream of doing it myself! Do we really need RCBOs on the lighting circuit? Overkill at that price? I was thinking of a 2.5mm ring in the garage if we eventually upgrade the...

Eureka! It's on the gland - 2L1.5, clear as daylight with the cover pulled back. Also managed to release a wire to see the copper and compare with known 1.5mm. It's definitely the same gauge. So, looking at MICC table 4G1A, the cable is good for 23 amps. This scuppers my plan for a ring with...

Will do tomorrow when I've cleared a space to get at it properly. Thanks a bunch, guys.

Bit late for photos! I'll take one tomorrow. Power-wise, I did want to run an electric heater and other stuff and was planning on rewiring as a ring with a 32A garage consumer unit.

Cheers JohnD. I've investigated further and you're absolutely right. It's a copper casing covered in a plastic orange sheath. The diameter is almost exactly that of a pencil, a bit less if you disregard the sheath. I'm beginning to wonder if the "STUB SLV 7 & 7.5mm2" is actually a sleeve...

Hi all. I'm planning to upgrade the wiring in the garage but, before going any further, want to identify the incoming cable to check its capacity etc. Garage is about 6 metres from the house, built and wired some 25-30 years ago. The cable (buried) is twin core and shrouded in a semi-rigid...

That's the stuff! Thanks, mate, it makes a lot of sense. Without wishing to appear cocky, I do have a degree in physics and am a serious electronics enthusiast. I've built and designed electronic equipment of vastly greater complexity than a shed supply. But I defer respectfully to you guys...

OK Ban-all-sheds, I take your point. Just that I was hoping for more information than, in effect, "Take my advice and don't do it". I'm not asking how to build an atomic particle accelerator, just what would be standard practice for wiring a shed 45 metres away, taking the supply from the...

Yes Who said anything about lying, for heaven's sake? I don't need to ask any questions. I just like to know more about these things before anyone starts the job. I freely admit to not knowing EFLI values but have now learnt something by looking it up. I haven't rejected a scrap of...

Thank you, Grizzly. I found another calculator which agrees with your 10.5V. The cable manufacturer shows this on the just-acceptable side of 2.5mm / 4mm. > And do you plan to notify? I was just asking some exploratory questions before ordering parts. The plan is to do most of it myself...

Thanks, leeco. Given that it's unlikely to need more than 13 amps, I calculate the voltage drop to be 4.2 volts with 2.5mm cable. Is this worth worrying about, and why not take off the ring main for such light loads? Can anyone answer the other questions?

Hi Guys. Great site. I need power in the garden shed. The load will only be lighting and a couple of sockets for hedge trimmer, saw etc. Length of run is 45 metres. The plan is to use 2.5mm SWA buried in a trench. Questions. 1. Consumer unit is at the far side of the house, awkward to...