What are smallest in physical size split core current transformers. Max load 100amp max cable core size 35mm.
Power cannot be isolated and space at a premium.
Thanks Andy
Hi there
I am struggling with the following calculation.
4mm Ring Final Circuit,
In = 32A
Cg - group of 6 with a correction factor of 0.57
Ci - 50mm insulation of 0.78
It = In/CgCi
It = 32/0.57x0.78
It = 71.97A
Then I get stuck here:
Ib < In < It < Iz
4mm Cable from Table 4E2A gives Iz of...
Hi All,
From what I understand, working out the design current - Ib for single phase is quite easy (max appliance power/voltage).
For three phase, do I take the max power, divide by 3 then divide by 230 to get the Ib?
(We definitely use 230V for everything right?)
Now for voltage drop, We...
Hello everyone, friends. In cases where I do not have a clamp meter, I want to measure the current drawn by the phases of a 3-phase motor with my multimeter. I left a picture below as an example. I connected my red probe to 10A., my black probe to Com. After turning the multimeter to 10A; For...
I installed an illuminated switch (switch is lit when circuit is off) for my porch light. I noticed that even when off, my LED porch lite is dimmly lit. I measured the voltage at the socket and it was 25VAC. Is this expected or did I install a faulty switch?
Hi
Doncaster EV ultra cable:
Does anyone know what the current capacity of these cables is given particular reference methods?
The spec sheet just says 'Max current' 45amps (for the 4mm) but it doesn't state the reference method.
The manufacturer does have a very handy cable calculator...
I have a small caravan park with 8 pitches. Each have a Rolec Electrical Hook-Up unit fitted with a Rolec 16A Single Pole and Neutral 2 Module C Curve 6kA 30mA RCBO.
I've recently fitted meters to these units which display voltage, Current and kW. I was surprised to see that some of the...
I WAS ONCE SHOWN HOW TO CALCULATE INSULATION RESISTANCE USING A CLAMP METER. SO I NEED HELP AS IVE FORGOTTEN. CAN ANYONE HELP WITH THIS FOLLOWING FORMULA 230 + (20X10-6) = 11.5Mohms how have the arrived at this. A clamp meter has been clamped around live and neutral tails at the consumer and...
If we had 4 appliances to power, one in every room of a house, Once the current passes through them all, the remaining voltage & current is said to "pass back to the source via the neutral wire"
Is this an accurate mental model?
From what I see, most Neutral wires are somewhere down the line...
Hello
Can anyone confirm for me what the following spec for a Wago TopJob 2202-1201 din rail connector means?
The connector can accept max 4mm solid core cable, so does this mean (see bottom row) the connector can cope with 32A? The row above says rated current is only 24A though? I’m easily...
I have just bought a tumble dryer that has come supplied with A 13A fuse.
The manual says it has come with a special plug, that must be plugged into a 16A rated socket.
Surely if I plugged it into a 16A socket and it tried to draw more than 13A it would blow? Can I plug this into a normal 13A...
Hi there
I have not done a huge amount of work on 3phase.
I am installing a Induction Hob as part of a new Kitchen refurb- to be specific the hob is NEFF T59FSRX2.
It is a 11,100W with the ability to power limit and support single or three phase connection.
NEFF have not provided great...
In a 3 phase system the neutral carries current that is unbalanced. Okay.
So in a single phase domestic household the neutral carries the same current as the live otherwise the RCD will trip.
So does that mean if we have a perfectly balanced 3 phase system then if I go to one of the phases and...
When I use Fluke multimeter clamp-type [true RMS meter] to measure AC current in a 3.5C XLPE cable, does it give the value of leakage current or RMS value of current per phase through the cable?
I’m designing a light fixture for underwater lights and everything was going great until I checked for any current leakage. All I have is a multimeter but my meter is reading 90 vac when lights are powered.
The bulbs are being supplied with around 120 to 135v and the reading I get from the water...
Hi,
What is th emaximum current draw allowable from the mains for...
UK domestic single phase
Light industrial single phase
Light industrial 3 phase
If there are different levels, then please advise.
Basically i suppose what i am asking is what current does the wiring have to be rated for...
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