The PSSC of a final ring circuit is 2KA so what is the min CPC size?
For PVC singles k = 115
CB 32A (BS EN 60898) will disconnect in 0.1 second
Fault current of low impediance = 2000A
S = square root of PSSC x PSSC x disconnection time (t) / Cable constant (K)
CPC size = 5.50mm (6mm cable)...
Hi guys,
I popped in late yesterday to change two 3 pin bayonet energy save fittings to a couple of fancy fittings for a mate in his 'L' shaped hallway. Both lights are individually switched at either end of the hallway.
I don't do much domestic sparking as am a facotry spark so never really...
ralshtovski
Thread
aus
black
brown
build
circuit
confusion
fittings
flat
light
lighting
lighting circuit
new
new build
I have a TNCS system in my ten year old house. I have a distribution circuit running to my detached garage 4 metres away via SWA. The PME is not exported to the garage but it has a separate TT system. My question is:
How is ZS measured at the DB in the garage and how can I check the earth...
alrite fellas, wondering if someone can enlighten me.
domestic property
very small 2 bedroom house
had rat infestation now rats have been evitcted lol
all results have been tested twice and then tested again with another instrument all calibrated etc
cables have been knawed etc, inspection...
Why is it that when you click on 'new posts' the list that comes up is different to 'quick links' 'todays posts'. I would have thought they are the same thing.
I need to buy a 3 phase HV transformer for an apartment block
1382 Amps is the total predicted single phase load after diversity.
1 Phase KW
1382 Amps
230 Volts ( I/V)
317.86 KW
KW 1 Phase KW to KVA
317.86 KW
0.9 Power factor ( KW x P.F. = KVA)
353 KVA
KVA Single Phase to 3...
santidreamer
Thread
3 phase
arial
aus
calculation
confusion
factor
ff0000
kva
phase
transformer
Im looking for an overview on 3 phase power transmission and would be grateful if someone could answer this;
Does the current originating from an ac generator at the power station eventually return to the generator star point . Im confused because Ive read that the return path for current is to...
hello guys, I'd just like you opinion as to whether I understand supplementary bonding.
To my mind supplementary bonding is additional protection to ensure that the voltage between extraneous and conductive parts does not exceed the safe voltage limit of 50. Therefore if you check between...
Morning I have Ten ballasts to install and the customer picked these up for me , but I'm not sure about these . surely there should be 3 in (L,N,E) and 4 out (to the tube)?? there only appears to be four connections in total. Prob simple for yourselves
Cheers
can anybody help me?
i have been contracting to companys for the past three years and i am thinking of advertising and starting up myself. when i have done work for the companys they tested and notified building control, what i need advice on is if i do notifiable work what would i have to do...
gazspark
Thread
advice
confusion
elecsa
electrical work
moment
napit
notifiable
Say I have applied to go the napit scheme or similar. What would I do about notifiable work before my assessment ? Do I send in a building notice to labc or do the work and use it as my assessment.
hi everyone. unsure if this is 100% right forum but basically i did a JTL apprenticeship from school.
ive moved house and have just received my replacement certificate that was lost in the move. i seem to need this certificate to do the 17th edition?????
anyway on my cert it says: "level 3...
sparkie1984
Thread
17th edition
confusion
courses
current
edition
qualification
Hi guys to become an electrician I followed this route:
2330 Level 2 (2 years)
2330 Level 3 (1 Year)
2391/2 Inspection & Testing (5 day course)
Working at Height and Haul Rescue Training (5 Day Course)
PASMA Advanced
2356 NVQ Level 3 Electrical Installation (1 Year alongside 2330 L3)
AM2 final...
eskimo39
Thread
approved
aus
becoming
confusion
electric
electrical
electrician
I have no previous electrical experience but wanted to complete a full house installation for my self build.
I understand that I can do this but would need to get the LA to check and sign off the work.
To try and help understand a little more I enquired to complete a Domestic Installer...
Just a point for discussion really on a quiet Friday. In Chris Kitcher's book, Practical Guide to Inspection, Testing and Certification, it states:
"If a Minor Electrical Installation Works Certificate is necessary, there is no
requirement to upgrade the existing earthing and bonding...
Hi all. Can someone please explain the difference between the two. Also if I know the Ze on a single phase installation is it a simple Ohm's law calculation to find out the Pscc?
hi guys just to ask i have been offered a kt64 for 280 pound brand new is that good? and also i have no problems with any test procedures but i need to differenciate between a 16th and 17th edition fuse board,(does it mean if its been installed before 2008 its not 17th edition) many thanks
Speccing a re-wire in bungalow with separate garage (1m from house) and a new shed/workshop to be 5m from house.
Bungalow on TT rod - no option for TNS orTNCS conversion
Now back in my learning days, I am sure that I was told that any separate building must have its own earthig arrangement...
Hi all,
I have been out of the electrical game for about a year. I am qualified but only to 16th edition standards.
I have just been offered a full time job by a local house refurbishent company.
I will be the only electrcian working for them, they have always used sub contractors and had them...
ste18
Thread
aus
company
competent
confusion
domestic
person
registered
testing
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