Hi, go easy on me please, I've just returned to the trade, well I am about to, I received my Gold Card last Thursday.
I've been gen'ing up for a couple of weeks going through the regs book, watching some fantastic youtube videos, and working through cable calcs and looking at products and...
Had UKPN come out to a property recently to upgrade the main fuse from 60A to 100A but when they arrived they said that the supply cable which he confirmed is a 25sq.mm. CNE aluminium concentric cable (1-phase, burried) for the PME supply is only able to take a 80A fuse. They will have to dig...
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...
Hi,
I need to swap out a damaged 30A junction box on an existing ring main circuit and thought I'd replace it with Wago 221 connectors and a Wago box, but got a bit concerned by the multiple ratings on the sides of the connectors.
Can I simply swap out an old 30A JB with Wagos? Will it be...
Hi everyone
I am doing level3 design andI have a circuit to design but I have confusion with radia circuit maximum floor area to understand?
I have a socket to feed on the design and floor area according to my knowledge is Length multiply width so in that case it exceeds 75 m square so I am...
hi
I've been asked to pick up a job where the previous builder went into liquidation and the property management company is asking me to complete the electrical works, relocate a fuseboard.
Everything the previous company has done is exceptionally neat but I'm concerned on the design front...
I'm looking at an install of a double oven cooker ... 11.3kW maximum demand ... and rather than use 10mm T&E for the final connection I have been looking at the CCC tables in Appendix 4
Table 4E2A on page 368 (3rd Amend of 17th) states I should be able to use a cable with 6mm CSA conductors...
Morning
The company that I work for has recently had an electrical inspection carried out. One of the findings consisted of 'ineffective overcurrent protection of cable due to rating of protective device and CSA of cable'
Basically a 100A isolator was feeding a 16mm SWA. The SWA conforms to BS...
Current carrying capacity is a figure which is given to us by manufacturers, correct? Now, I've watched those videos of the guy trying to set fire to a piece of 1mm and it takes quite a bit more current to set a light. So for example, if you had a 9kw shower and a 9.5kw instantaneous unvented...
evening all working away with no regs etc anyone tell me cable size for 200a 3ph head feeding a 6way 3ph ryfield board singles direct from head to db approx. 1m long cheers
Hello, I was just looking for some help with the above subject with looking up the tables for the various protective device and finding the values of C connected with CCCC. I was looking for the rating factor for a BS88 fuse and I found at least 2 different tables the difference being that there...
Why is it that the tables in the Regs for Cable current carrying capacities vary so much from that of a cable manufacturers data sheet, for example a table in the Regs book states a 240mm 4 core XLPE Armoured cable buried will carry 324 amps, but a data sheet for a leading manufacturer states...
can anyone help please,
I am testing a new installation for another contractor, lighting circuits are wired in 1.5mm pvc singles in 4inch metal trunking, protected by 16amp type c mcbs, is this overated considering correction factors applied? thanks
Any reason why 6x1.5 mm singles within 20mm plastic cinduit on surface shouldnt be used for a 3kw load. Length if run is about 6 metres. Fused a 13a via sf spur.
Thanks
Does the current carrying capacity of cables change on what voltage your using??
2.5mm can carry 27a at 230v
would this be the same for 1000v
could someone please explaain this whole process please
Confused lol
Grant
p.s i'm a student :)
iamgary25
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Can anyone help me out with this? Need to find the max current carrying capacity for 4mm singles over a 10m length in both metal trunking/pipe with a 20A 60898 B Type breaker protecting cct. No thermal insulation at an ambient temp of 30•C.
If anyone can help with breakdown of calculations...
In the red Osg is t&e table 6f ? Ie flat cable? I notice that table 6 e1 has two core and three core non armoured would this cover t&e or is this for flex only.
We havnt covered this in college
Thanks for any help given.
Craig.
I am happy with calculating current carrying capacity for straight runs of cable. I am not to sure how the imact of a ring effects the cable calcs? Its hard to see what the possible loads might be. As of this do you take the center point and use maximum demand?
So for example on a 35 meter ring...
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