Good Morning Fleeting, I did think this, hence my original thought to isolate the circuit for now, but when doubting my Friday afternoon clarity of thought a discussion with some other wiser (?) colleagues lead to advice to treat the heater as a fixed resistive load....but as you say, if there...
Thanks binky....the 13A fused switch had definite signs of overheating (running at close to 13A for close to 10 hours a day) but had not melted as I've often seen when an immersion heater has been wired through a FS, so I would definitely want to swap out for a 20A switch. If we are saying that...
Good Morning All.
Emergency call to local charity shop yesterday due to "no heating".
3 x 3kW "curtain heaters" on site, 4 of these on individual 16a MCB with 2.5mm T+E to 20A control switch...happy days, replace damaged control switch for 2 of these which had been damaged by being knocked...
Good morning all. Would appreciate your thoughts on the following.
Call out yesterday to 1970's domestic property with 50% of ground floor lights not working, no MCB trip (lights not RCD protected). I was hoping for a relatively straightforward binary search, checking at ceiling roses for a...
Thanks Fleeting.....and that's why I come on the site....sometimes the answer is staring you right in the face but you're so close you can't see it without someone else pointing it out!
I believe the 0.05Ω figure comes from GN8.
I take your point regarding the isolation / parallel paths.
Question remains whether my continuity measurement of 0.22Ω is sufficiently low to consider it "evidence" of a hidden MPB to the structural steel, or whether I should indeed be recommending...
EICR on commercial premises approx 8 yrs old. Structural steel is confirmed by test as extraneous conductive part. No EIC / paperwork available.
MPB to gas / water services confirmed visually and by measurement - 1 continuous conductor serves both. Unable to visually locate MPB to structural...