Electrical Advice

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Moving CU away from service head. SPD at the fused switch or DCU? Discussion ThreadMoving CU away from service head. SPD at the fused switch or DCU? Electrical Advice

I'm moving my CU away from the service head. About 8m in 25mm2 SWA. Do I need to put an SPD T2 at the 100a fused switch I'm installing or can I get away with just having one at the new CU location? I'm struggling to find options for the service head location. They a lot more expensive and the box is bigger, smaller...

 

tridonic switchdim ballast Discussion Threadtridonic switchdim ballast Electrical Advice

i was just looking at a job today, where the push switch on the wall had the feed coming into "com" and a brown in " L1 " and blue " L2" when i took the light down it had a brown in "D1" and blue in "D2" is it possible to apply 240 volts to both those connections on the ballasts or is "D2" always neutral??

tridonic switchdim ballast for the original thread on Electricians Forums

 

am2 Discussion Threadam2 Electrical Advice

hi everyone i’ve just taken my am2 and realised im made a stupid mistake on the test sheet the breaking capacity of the breakers i’ve put it in ampeares and not KA so ive put 10,000 in every box when it should be just 10KA will this be a instant fail

am2 for the original thread on Electricians Forums

 

SWA used to feed DC motor armature Discussion ThreadSWA used to feed DC motor armature Electrical Advice

Hi, Is it permitted to use 2-cores of a 4-core swa cable for DC+ and the other 2-cores for DC- for motor armature, the field being fed by a separate cable?
Thanks
Dave

SWA used to feed DC motor armature for the original thread on Electricians Forums

 

12 volt bulbs on 240 volt circuit Discussion Thread12 volt bulbs on 240 volt circuit Electrical Advice

Hi just seen the bulbs on my outdoor Xmas lights are 12 volt 3 watt on 240 volt circuit. How can they be working? They do!

12 volt bulbs on 240 volt circuit for the original thread on Electricians Forums

 

ZS testing - dangerous? Discussion ThreadZS testing - dangerous? Electrical Advice

I have read somewhere that performing a zs test where there is exposed metalwork and people around can be dangerous? Is it something that has to be avoided? Or does it say anywhere that it must not be done? Should i be worried about carrying out Zs tests now? :/

ZS testing - dangerous? for the original thread on Electricians Forums

 

R2 test without removing cover Discussion ThreadR2 test without removing cover Electrical Advice

Hi all when performing an r2 test prior to commencing an EFLI test would it be acceptable if the board was made from metal of course to test from the point to the outside of the board rather than to the earth bar? Just for when you are working with large 3phase boards full of cables.

R2 test without removing cover for the original thread on Electricians Forums

 

Signal generator amplifier using only positive pole output, underperforming Discussion ThreadSignal generator amplifier using only positive pole output, underperforming Electrical Advice

I have a 100W 50 ohms signal generator amplifier with a 35 meters coil wire (1.5 mm) as a load, BNC connectors. The requirement is that only the BNC POSITIVE pole is connected to the wire and used as antenna. The amplifier require a minimum of 4 ohms load. This is not a closed circuit antenna...

 

Circuit design for computer circuits. Discussion ThreadCircuit design for computer circuits. Electrical Advice

Hi Guys,

I'm currently designing an installation that will be used to configure multiple pieces of electronic equipment such as PC's, Servers, All in ones etc. Its going to be set up in bays such as the picture attached. With it being a full socket installation I was hoping for some guidance if I'm approaching the maximum demand calculations correctly with diversity. There...

 

Adjusting water temp. Aquafficient solar Discussion ThreadAdjusting water temp. Aquafficient solar Electrical Advice

Hi

How do I adjust the water temp?

Thanks

Adjusting water temp. Aquafficient solar for the original thread on Electricians Forums

 

Clear up a bonding debate of ours. Discussion ThreadClear up a bonding debate of ours. Electrical Advice

Hi all
Wondered if you could clear up a debate we are having at work.
Gas inspection has said no bonding to the gas meter or pipe in block of flats.

One engineer says it should be run to the meter.
One says it should be installed outside within 600mm of where it enters the building on the blue arrow.
And one engineer says it should be inside 600mm from where it enters the flat...

 

Local RCBO protecting ring final alteration. Discussion ThreadLocal RCBO protecting ring final alteration. Electrical Advice

Hi
I completed a job recently where a hotel reception had a new desk fitted. The old desk dado was supplied via an RCD spur from the existing ring. This ring is fed from one of the very old Merlin single phase boards which I’ve been told you cannot retrofit Schneider ic60n RCBO’s in. I had to remove a couple of sockets including the existing Rcd spur from a...

 

RCD test button Discussion ThreadRCD test button Electrical Advice

Hi, can anything else cause a RCD test button to fail, besides a faulty RCD.

RCD test button for the original thread on Electricians Forums

 

Light switch replacement (lights flickering) Discussion ThreadLight switch replacement (lights flickering) Electrical Advice

Hi,

Friend asked me to check out their light switch cause the kitchen lights were flickering and the faceplate was getting hot. They sent the photos below to show what it looked like, obvious issue is the common looking fried, which I put down to a loose connection, hence the flickering lights.

To replace the front plate, all the old wires go in the same...

 

t8 fluorescent tube led replacement Discussion Threadt8 fluorescent tube led replacement Electrical Advice

what is a good led replacement tube for a t8 fluorescent tube

t8 fluorescent tube led replacement for the original thread on Electricians Forums

 

Generator to run oil fired boiler or immersion heater? Discussion ThreadGenerator to run oil fired boiler or immersion heater? Electrical Advice

Hi. We've a champion generator, inverter, dual fuel, 3.6 kw, which we've used a couple of times during power outages over the last 18 months to power a fridge (class 1) - needed to keep my partner's meds. at fridge temperature and a range of other items (class 2) such as broadband router, TV, radio, a couple of standard lamps. Simple system...

 

Catenary wire Discussion ThreadCatenary wire Electrical Advice

Hi all looking for some help. I was looking for the minimum height of a catenary over a road, i cant seem to find it in the regs, can anyone help? I need to know where to find it in the regs book, thanks for your help in advance.

Catenary wire for the original thread on Electricians Forums

 

Diversity on a 20 Way or longer CU with many (low utilisation) ring mains Discussion ThreadDiversity on a 20 Way or longer CU with many (low utilisation) ring mains Electrical Advice

Hello,

A quick question which I suspect is becoming more commonly asked as we go towards having more ways in our CUs.

Domestic dwelling, nothing too exuberent but during rejigging the large downstairs ring was split into three and some radials added, as well as seperate feeds to allow for a...

 

Anyone work with FP200? Discussion ThreadAnyone work with FP200? Electrical Advice

Hi,
Anyone work with FP200 and is able to take some photos for an NVQ as an example I'm putting together? We can discuss some payment.

Message me here or privately if interested

Anyone work with FP200? for the original thread on Electricians Forums

 

Can you add a second fixture to a switch loop? Discussion ThreadCan you add a second fixture to a switch loop? Electrical Advice

I currently have a light fixture on a switch loop and would like to add a second light that would be powered by the same switch. Can you add a second fixture? Forgive my novice picture, but if so, is this an allowable setup?


Can you...

 

24v DC driver for LED lights. Discussion Thread24v DC driver for LED lights. Electrical Advice

Hi all,

Can anyone recommend a decent 24V DC constant voltage LED driver.

It’s for an install of bathroom niche LEDs IP65 downlights. They are mini and have a 35mm cut out. The 1.5mm T&E is already dropped to each cut out but need a driver that will fit through a 35mm whole and to be pushed up.

Many thanks,
Jay

24v DC driver for LED lights. for the original thread on...

 

Issue with r2 reading on ring final circuit due to parallel paths Discussion ThreadIssue with r2 reading on ring final circuit due to parallel paths Electrical Advice

Good evening,



Been on and off on this project, they’re all brand new flats and now I’ve come back to carry out EIC tests.



It’s all first fixed in steel conduit and have stud frames with caddy clips on, so naturally been told to earth back boxes. Before I left I mentioned to the QS running job it’s best to leave...

 

Problems with my roof Discussion ThreadProblems with my roof Electrical Advice

I mentioned it a couple of times on other threads, and will link to here from those....

I found this diagram on t'internet showing how my roof has been constructed... closest anyway.

In my situation, the cavity wall on the left there has been removed, with a steel beam holding it up. Modern timber frame house with external rendered...

 

Voltage Drop Calculation vs OSG Discussion ThreadVoltage Drop Calculation vs OSG Electrical Advice

Hi All,

Hoping to get opinions on Vd calculations for a 1.5mm2 downstairs lighting circuit with an estimated length of 128m!
Length is due to loops at switches (neutrals required) and switched lives feeding various strings of lights.

...

 

Wiring up Garden room (Need help on Dali light) Discussion ThreadWiring up Garden room (Need help on Dali light) Electrical Advice

Hi, recently got a garden room and completely wired it up but running into a snag. Is there any way I can use dimmable led batons that have Dali output with just a dimmer switch as I’m having problems getting it to work.

I know usual you have to have a permanent feed at each light and switch wire. Is there no possible way I can just dim it up and down...

 

Hi I’m looking for the maximum permissible resistance reading of earthing rods Discussion ThreadHi I’m looking for the maximum permissible resistance reading of earthing rods Electrical Advice

Hi could anyone point me in the right direction for the maximum permissible resistance reading for earthing rods?

Hi I’m looking for the maximum permissible resistance reading of earthing rods for the original thread on Electricians Forums

 

EICR Frequency Discussion ThreadEICR Frequency Electrical Advice

Asking for a friend who works in the health and safety sector, was asking me about the proper time intervals for EICRs in commercial and industrial settings.

I had a look in BS7671 and I see ( Reg 652.1 ) that it doesn't give specific timescales for various settings, only general guidance.

I found this video online (the veracity of which I cannot be sure) which seems to suggest 3 years for factories, and for some...

 

ASHP Supply & CU Setup Discussion ThreadASHP Supply & CU Setup Electrical Advice

Evening all,

Just after a sense-check before I commit & send the quote.

I’ve been asked to run in an SWA to feed a small CU that’ll sit inside an extension on the side of the house for the ASHP from a Tesla Gateway.

The customer has said the heat pump guys have asked for 2x 16A & 1x 6A circuits for the heat pump, immersion & control gear.

My plan was to fit a 40A C Curve MCB in the Tesla Gateway, run...

 

ASHP Supply & CU Discussion ThreadASHP Supply & CU Electrical Advice

Evening all,

Just after a sense-check before I commit & send the quote.

I’ve been asked to run in an SWA to feed a small CU that’ll sit inside an extension on the side of the house for the ASHP from a Tesla Gateway.

The customer has said the heat pump guys have asked for 2x 16A & 1x 6A circuits for the heat pump, immersion & control gear.

My plan was to fit a 40A C Curve MCB in the Tesla Gateway, run in the 10mm...