Search results

ericmark, thank you for bring common sense and decency back to this thread. I completely agree with you that for many people (possibly most) it takes a few years of hands on practice then some formal training. In fact, I think that should be the way because I have seen that method produce very...

keep up with the programm Stoday, I was answering a question from holmslaw.

Arggghh, you have both caught me out, 34 years in industrial control is just a drop in the ocean compared to your experience. Just off to test the gate/drain of some power MOSFETs with my 1000volt insulation tester (have jammed the test button on with chewing gum for quick fire action) Now...

Because it is unlikely that the wiring will be run greater than 50mm from the surface or in earthed conduit/capping In any case it is a room containing a bath or shower so 701.411.3.3 of BS7671 would apply.

If you have electrical experience and knowledge then share it on this forum with dignity and debate issues with respect not with rudeness. Who is it you are trying to impress?

My mistake indeed, 10mm will be OK provided the installation method is appropriate. Though I would still encourage the OP to get a registered electrician in to spec and do the work.

It does not have the same effect and it is not the same thing. Example: (assuming 230V) insulation resistance between L/N of 5KOHM would result in a fault current of approximately 46 mA which would not activate a 20amp MCB or even blow a 1amp fuse. A dead short would result in a very low...

If you are checking for a short circuit then you first need to define from where to where and are you really looking for a short circuit or poor insulation resistance. Examples: from Live to Neutral over a 6 meter length of open cable. from Live to earth over a 4 meter...

Rocketman, is the shower really 10.8KW? At 230VAC a 10.8KW shower will draw almost 47amps which will exceed the current carrying capacity of the cable. You may be looking at 16mm cable. If the cable is bundled with other cables or run through any thermal insulation (even for a...

The most appropriate way to wire the towel rail is for your electrician to add a fused spur (flex outlet with 3amp fuse) from your ring final circuit (ring main) The circuit MUST include a residual Current Device (RCD)

The maximum is 7.5 KW (taking into account the practical KW ratings of electric showers in the UK on a 230VAC - 240VAC supply) 230VAC is the assumed voltage for all calculations these days. However, that is the absolute maximum shower KW rating assuming a cable run that is not too long...

That means 18 watts maximum but some will not work correctly if you place a significantly lower wattage lamp in them. I have found great variability based upon upon make/model.

Yes, saw that last night on the news. The news reader inferred (in his tone) that the aluminium shoes protected the horses... As we all know aluminium is a very good conductor so I don't quite understand their thinking. Unless the shoes were were coated or anodized and quite new. (Am I right...

Glad you asked the questions, they led to an interesting and nostalgic conversation. I do miss the mercury arc rectifier though, saw my first one during an open day at Plymouth Dockyard in 1963 and thats what "sparked" my interest in all things electrical.. the days when you could...

1. from consumer unit into junction box 2 core+earth You need to connect the new brown from the new switch to the red from the CU. 2. there is another 2core+e in the same junction box which goes of to feed another junction box Good but we do not need to worry about that for now...

The politics to one side for a moment (which I don't pretend to understand) The quantum efficiency of PV panels are improving steadily. The more people that invest in them should ultimately bring the prices down over time. Utilising the power of the sun instead of paying high utilities bills...

Assuming you are talking about photo voltaic (PV) panels? They convert solar energy into DC electrical energy. A seperate invertor converts the DC to AC. The AC (230VAC) is used to power your appliances/lights etc. Some or all of it can be sold back to the grid. Yes you do need to...

Have a good read of the links posted by B-A-S. What you say is an unswitched live does not sound like it is unswitched. You can try this: 1) Leave the new brown (from the new switch) disconnected at the junction box. 2) On the new switch: link common to the original switch common...

1) run another twin + earth from the junction box to the new switch (whether the new switch is ganged to the original switch position or not) 2) at the junction box disconnect the brown that runs to the new light and connect it to the new blue that you will run to the new switch. (place some...

Good, do the following: 1) run another twin + earth from the junction box to the new switch (whether the new switch is ganged to the original switch position or not) 2) at the junction box disconnect the brown that runs to the new light and connect it to the new blue that you will run to...