Search results

Big heavy spinning things (including but not limited to turbines and generators) store energy in their rotational inertia. When those big heavy spinning things are coupled directly to the grid the grid as a whole effectively gains that inertia. This inertia acts as the first line of defence...

Some "two-pole testers" automatically test for continuity if no voltage is detected.

Fundamentally one would expect electricty generated from gas to be more expensive per kWh than gas itself, because gas power plants are only about 55%-60% efficient and because of capital and maintinance costs but that alone doesn't really explain the massive difference seen in the UK. Still I...

I'm fairly sure BS7671 has a list of what standards devices used for isolation should meet and the standards for plate switches (even DP ones) are not on the list. FCUs *are* on the list, but BS7671 doesn't make it clear which part of the FCU should be used for isolation. Personaly if using a...

The problem is the green lobby have convinced the government that the heat pump grants and planning exemptions should only apply to heat-only systems. I think this is very short-sighted, but it's the reality we currently have to deal with :(

According to https://integral-led.com/Image/GetDocument/en/333/ilembh026_guide.pdf the battery is supplied unconnected and needs to be connected before use.

The wiring leaving the left and top of the cream box on the left, certainly doesn't look modern. Some of it looks like old conduit, (which may well contain VIR singles), other bits I can't identify.

Depends, on what you mean by "reasonable" I guess, the 35KW ATAG I have at my current place is ok as a single occupant, but still noticably slower than the traditional tank-based setup at my parents house. I don't think I'd want it as a family. It seems noticablly better than the 28kW bosch I...

The main reason for wanting high power output on a combi is to allow running a bath in a reasonable length of time.

I don't see any mention on the site of what if-any standards the switch is designed to, which is at-least a yellow flag.

We should not design installations we anticipate will be overloaded, but we have to consider the possibility that people will use an installation in ways the designers did not anticipate. One of the functions of overcurrent protective devices is to protect the installation against overloads...

I think, realistically this is only likely to be an issue if the property relies on electricity for space heating *and* has a 60A fuse. Loads like cookers, showers and white goods just don't draw power for long enough to have a meaningful impact on EV charging.

If your cooking and heating are all gas then 80A is plenty. Even if you have an electric cooker and shower I suspect 80A will still be fine in most cases. If you start getting into electic for space heating then things could get tighter. If you are worried about load, and the DNO won't upgrade...

Lets assume for now the switch has a metal plate. Now suppose that the earth wire to the switch becomes disconnected from the earthing system, but the neon is still connected to the switch plate. Now the current flowing through the neon has "nowhere to go". The switch plate becomes "live". If...

Taking a quick look (IANAL, I may well have missed something( Many of the regulations in the ESCQR are scoped to generators or distributors, but there seems to be at least one regulation that is scoped explicitly to consumers , and some of the regulations relating to underground and overhead...

I agree, that is the most likely cause, but it needs to be confirmed. It's also possible (but less likely) that the issue affects the entire installation.

Yes this needs to be addressed. The next step would be to test the continuity of the earth wiring from that fitting location back to the main earth terminal. This is not teriiblly difficult but does requilre a long temporary cable to be set up. If that is bad, then the fault is within the...

Some electricians don't like them, but I think anyone saying they are "no longer as thing" is stating their opinion as fact. There are three main options for socket circuits, 20A radials, 32A radials and 32A rings. A 20A radial is only enough for one full-sized load (e.g. kettle or electric...

Getting rid of or relocating accessories is problematic, for two reasons. 1. There are rules about joints that are not accessible for maintaince. Spring terminals can be used, but only if part of a "maintaince free junction box" and I haven't seen one of those designed for burying in plaster...