Electrical Advice

When wiring in conduit and trunking in single core cables from a three phase board do you use the three phase colours, Brown, Black & grey or do you only use brown for all three phases?

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Hi,

I'm going to be installing underfloor heating mats (150w) but I'm after some advise on the insulation boards to put down first. They seem expensive I was wondering is there a cheaper alternative? Or am I going to just have to buy the boards they recommend with the mats?

Iv never installed underfloor heating before they look pretty straight forward? Any advice would be welcome.

thanks

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Hi,

Apologies if you didn't want this email. It's a mandatory one as it's about our business social pages which contain contact details and things. Warranted as important.

I've been working on some Facebook Pages and Groups over the past 6 months and here is the outcome. Some further along than others I must admit. But I find now facebook has allowed personal profiles to create a new account within that account, with its own NAME and FEED. You now can promote your business and have it...

 

Hi
Anyone know off hand what the weight of a 50M roll of 10mm2 earthing cable could be ?.
cheers
Spike

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Hi all. I am trying to figure out how to add a few amber color LEDs to a 1953 Zenith K622 radio. One to light the tuner, one for the clock and one behind the center grill. I've gone down some rabbit holes. At this point, I would tap the original 110vpower and connect an 110v AC to 9v DC step down power converter then, from that, parallel wire three LEDs after three resistors. Does this sound right???

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During Periodic Inspection and Testing, prospective fault current has been tested at the main distribution board (Main DB) using a single-phase test instrument.

The supply and installation form part of a 400 V three-phase TN-C-S system. The value of Zₛ (earth fault loop impedance) for this installation is 0.05 Ω.

Information about the protective devices installed at the remote distribution boards (DBs) is as follows:

Main DB: 3 phases, 10 kA
DB1: 3 phases, 7.5 kA
DB2: 3 phases, 7.5 kA...

 

Big Clive has done a new video striping down and explaining how MCBs work. Well worth a watch Now I wounder what a clear CU with clear MCBs would look like. Obviously it wouldn't comply with current regs but you would know if it was a neat instal or not.

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I have decided to insulate my ground floor suspended joist floor in the living room using 140mm of rockwool duo slab (R-value 4.1 m2.K/W).

2.5 mm2 T&E is currently running under the floor and I want to place it in top of insulation directly under the subfloor (not to bury it in). Would it affect the current capacity to the level I need to be concerned? Should I place it in a conduit or maybe lay it on some kind of galvanised tray? Optionally, since I have access to it, would it be a good...

 

I am wanting to install some outside lights in my patio, can I use H07RN-F for this? It will be run underground. My issue I have for SWA is finding a floor light fitting which will have the room to have the connections hidden. As it won’t be as flexible.

Also if anyone has suggestions on floor light fittings? I am looking for something that isn’t recessed and isn’t of glass

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I have read here and there that some of Electriums brands are going to cease sales in the UK market, does anybody have any detail? searches not bringing much up..

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Hi, I'm wanting to add 4 double & 1 single socket for a media wall, I've checked the wattage of each electrical item tottaling 2535W & calculated I need 11.02 Amps, can I run a 13 amp fused spur from the back of an existing double socket & then run cables to connect the sockets in a radial fashion from the 13A fused spur, one item is an electrical fire which draws nearly 8A, is it better to have that run from a different 13A fused spur from a different double socket, I will get a local...

 

Hey guys

This is a 2 bedroom semi.

I need an outdoor socket installed on the piv I have red marking.

The nearest socket is behind the wall I have marked red in the living room. The other socket is across the room opposite.

What will be ehe best way to route the cable from here to where I want to install the socket ? Would i need to drill ij the joists etc ?

Would a 2.5mm twin and earth work...

 

Good Morning All...
Does anybody know what motor thermal overload would fit a TELEMECANIQUE LC1 D18 10? I need a 23A overload.
Would this work TELEMECANIQUE LR2D2353?
I can't seem to find any with the correct distance between the inlet 3phase connections for my contactor (photo attached).
Thanks!

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I’ve got a central battery system at work which has slave emergency circuits.

There is a 230VAC supplyto a transformer which then has a rectifier supplying DC to the circuits. The bulkheads are custom made with inverter inside.

I can get a Zdb at the 230V supply, thus able to calculate the Zdb at the 110V load of transformer… however when using a Megger Loop Tester (LTW425) I receive the error code “Chck” which when I looked it up says it’s lost connection and retries after a couple...

 

hello quick question. in a industrial setting would it be ok to fit a new consumer unit with a main switch RCD or do circuits need to be individually protected? wether there is only 2 circuits or 12 does this matter ? thanks for your time

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Hello

I am a self employed electrician, My background is heavy industrial electrical maintenance mostly on power stations and wind turbines. However I am now transitioning into installation and have been cracking off my qualifications for installation to become eligible for a competent person scheme which I have almost achieved (2391 ongoing).

I have experience with dedicated testers such as Megger IR testers, Fluke multimeter, current clamps, Sverker injection testers and ductors however...

 

Interesting article below.

Opinion: I’m a power engineer. The Iberian grid collapse makes me very afraid for Britain — The Telegraph ​

We will soon lose most of our remaining grid inertia, increasing the risk of outages

apple.news

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Does anyone have a source for good quality LED tape that has programmed effects rather than just one colour at a time.
“Addressable” or “pixel chasing” would be the description.

Local gym wants 4 parallel lines along their ceiling in the exercise room above the bikes to give the illusion of forward travel.

Need 4 lines of about 8 or 9 metres long, but the main thing is, they need to synchronised. Ie, speed, colour, rate of change need to be constant across the 4 lines.

I had a short 3m...