How much current capacity can handle in a 16 sq. Mm. Wire size in ac 415 volt supply?
Because i have 2 pump motors that will connect to a power source of 415 volts ac 3 phase; 1 motor is 5.5kilowatts and another one is 7.5kilowatts. Both motors will run intermittently and supplying different...
Can anyone point me in the right direction.
I am working for a company who do temp power for welders etc from a generator.
We have been given a load of new boards to pre check befor they go on site. Powerlock connectors in and then D63 on a commando sockets.
I have put the maximum zs of...
I have alluded to this in previous threads. The commercial site I work on has asked me what I think the total KVA for the site is. Having looked at various ways of viewing this I am getting lost with it. So if I just say
kVA = ( V*A*1.73)/1000 and assume supply is 400V and take the main incomer...
Hello,
I live in a house where part of the wiring dates to 1960 (exact). Now I know after ~30 years old, a rewire is advised. And at 58 years it should definitely be rewired, but it's going to be difficult to convince my parents to have the house rewired soon - as we have 5 people living here...
really trying to get the customer to see sense, they have supplied scaffold tower for lighting replacement about 5metres off the ground, which i have been pottering away at with this shitty scaffold tower getting stuck in the sand below and hitting against the beams of the shed itself
almost...
Hello the on site guide lists 20 amp maximum mcb for 16 amps sockets. Having a debate with someone as to why this is? Why not 16amp mcb? I installed 20 amp mcb as it's for a car charger that charger's at 16amps for 8 hours and is not capable of pulling more than 16 amps but this has been pulled...
Hi, I am studying to become an electrician. I got a question wrong on a practice test.
Can anyone help me understand maximum demand.
this is the question I got wrong.....
Question 27: With reference to the nature of the supply, which one of the following can be determined by calculation...
Hi,
I'm looking at installing a solar water system for a friend. He runs a B&B so has much higher hot water needs during the summer, and also a very high annual bill for heating and water. So it seems like he's ideally suited for a solar thermal system to at least reduce the costs.
We live in...
If the maximum zs is okay up until 1667 ohms protected by a rcd why do we care about maximum disconnection times for the mcbs e.g why do we test and it's important to meet 1.37 or 1.1 zs on a 32 amp circuit
i need to wire in an induction hob which is 6.5kw and the cable already chased in is 4mm and would be a real pain to replace for a bigger. I just wanted to know if it would be alright or play it safe with a 6mm?
Evening all. At the risk of being ridiculed I wonder if someone can clarify something for me!
On the initial inspection forms for installations there is a box for "maximum Demand". This can be in KVA or amps. I've been told that you add all the breakers on the board up then it is 40% of this...
Hi,
Can anyone point me in the direction of the regulation / code for the max solar MCB size when connecting into a spare way of a local distribution board ?
Eg. Is it possible to connect a 100A breaker into a 100A board ?
Stengs
Thread
breaker
distribution board
maximum
mcb
size
solar pv
three phase
Just started doing my first block of flats as a Qualified supervisor.
I have 5 flats and a landlords supply to wire up.
Done my calculations a while back and told the DNO I would need require ADMD of 12.5 kva for each flat which I thought was reasonable, Considering I have 3 rings, 2...
Hi all,
Quick question when doing r1+r2 testing wether its a new install or a EICR, is there a table to show maximum readings we should be getting? Or is it a calculation?
Thanks in advance
Luke
First post all so go easy lads....
What's people's views on maximum amount of LEDS on a 6amp mcb lighting circuits?? 6w LED GU10s throughout. Wired in 1mm twin and earth. Maximum cable runs??? Nearly every spark I speak to has a different verdict. Should we still be considering if 50w halogens...
So now what's the feeling these days on working out maximum demand for domestics, the OSG method has to go out of the window surely, with more and more division of circuits going on. I have been pondering my latest job, very nice but older installation done by an old electrical engineer...
i have just done a test on a property and the pfc at origin of installation was 0.712ka. The 3871 mobs have a 6000a breaking capacity. I am a bit confused as I have read something about it always being higher anyway (16ka) for a fuse or main switch 100a or less. Any info here would be much...
My 88 year old mum needs new lighting in her very small open plan kitchen. They've just built a house next to hers and the daylight is much diminished in her kitchen and adjoining dining table area. Can anyone recommend a good bright diffuse light for her kitchen ceiling? Would this light be a...
Sarafailsbetter
Thread
ceiling
ceiling light
device
kitchen
light
maximum
white
Hello all,
This question has always puzzled me - hopefully you will be able to help?
I'm looking at replacing my main lounge light, as it's current light low voltage transformer has failed - so I want to replace it with a mains voltage light, to prevent any more transformer issues in the...
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