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Law no, but regulations yes, BS 1363 says "Plugs shall not be used for the connection of electrical power generators to socket-outlets." so following the rules can't use a 13 amp socket. As to DNO, G99 was applied for and got, but took 20 months to get the MPAN number to allow it to be...

My maths is poor, and it did limit what degree I could get, so only have a foundation degree, but once you leave academia not used that much. I found too easy to make an error, so would use Excel or Java Script so I could test with known results, then use the figures I needed, but today those...

But it was a three-legged component that failed, resistors normally have two legs.

There is a small advantage with the Y Plan, it allows the boiler to cool by heating DHW as that is the default state. But although this is a marked advantage with oil boilers, with gas boilers, there is little advantage. The main problem is to heat a boiler and pipework requires energy, so you...

Yes, we know it would likely fail if a solar inverter is plugged in, but they should not plug in a solar inverter, so we pass it. Like we know this corner is dangerous at 70 MPH, but speed limit is 30 MPH, so no need to improve the corner.

Agreed, but I would guess you are the same, why press a test button if you have a proper RCD tester?

Thanks, so it is clear it is an erroneous report. The problem as I see it, any erroneous report means:- 1) The landlord has done his duty, by getting a report. 2) He does not need to action anything as he knows the report is erroneous. 3) He does not need to pay for an erroneous report. As to...

I have never pressed the test button on a socket supply, why should I, the RCD test rig tells me if within 40 mS the test button does not, so only would use test button on a circuit where it is hard to use the RCD tester. And in the main, that means it does not really matter if the RCD does not...

@flameport has made the point, until BS1363 changes, they are simply breaking regulations if they are using anything needing a bidirectional RCD/MCB/RCBO with a socket supply, so if it works, then we pass it.

In the main, they do not do the EICR under the umbrella of the scheme. So most of the time the scheme provider is not interested in the report.

Can anyone quote what 512.2. says? My old book says 512.2 External influences, which has nothing to do with a back board, so what does it say now?

I do see the point being made, if BS1363-1 says "Plugs shall not be used for the connection of electrical power generators to socket-outlets." then we should not be considering what happens should someone break the rules. Same if someone crashes in a 30 MPH area when doing 60 MPH that does not...

That seems too high, in general we increase tripping by a factor of 3, so 10 mA, 30 mA, 100 mA so the test button must use less than 50 mA at 253 volts to ensure it does not trip the next RCD in line. Had this with a MK 10 mA socket where it would trip not only the 30 mA but also the 100 mA RCDs...

That is my point, one can't replace items, if not sure is there is in fact any problem with the old one.

Main problem is most relays are designed to go into an enclosure, I have a relay with my central heating, and the oct base clips onto din rail in a box and the relay pokes out of a hole in the box top so can be changed without opening the box, it was selected as I had the relays in stock and the...

This is likely as we find they have loads of waffle in them. I bought a battery powered drill, grinder etc. Which does not come with batteries and charger, both sold as separate items with of course their own instructions. So why with a battery powered device, are there instructions on how to...

The time the button was pressed with the efixx demo was not excessive. Had it not been during a test, I would have said it was simply a component failure, but it was clear all due to test button being pressed during the reverse flow. If it was not for plug and play solar, I would say there is...

I have only bothered with one car to swap tyres, this was because sensors detected wheel speed, normally front wheels go same or faster to rear wheels, so if this is not the case, it assumes loss of traction and auto switches in all-wheel drive. So most worn tyres had to go on the front axle...

After heavy rain, I find I need to drive very slowly at night so I can identify flooding and take the required action, be it wade through or stop and find another route, working out when I am looking at a flood is not always easy. So self drive cars must be able to identify floods and the like...

I remember the time, when you were not permitted to take a mobile phone with a camera to work. My sister was having a problem getting a reasonable mobile phone without a camera. Today people feel they can take pictures anywhere, the amount of pictures I see of front doors with a parcel on them...