Discuss amps carried in cables in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

W

wannabesparky

can someone please help me to understand how many amps 1mm + 1.5mm + 2.5mm + 4mm + 6mm + 10mm twin & earth cables can carry please or put me in the right direction,
Also what size breakers are appropriate for the 1mm + 1.5mm + 2.5mm + 4mm + 6mm + 10mm twin & earth cables
 
cables can carry particular currents according to their csa, but then various conditions and factors will derate them eg running in insulation derates by half (i think) MCBs are there to protect the cable so should be less than the calculated current in the cable after you have taken the other factors(ambient temp, fuse, grouping, insulation etc) into account. I have been reading about it in scadden. Chapter 18 circuit design, of his book " electrical installation work"
 
Last edited by a moderator:
Not long gone over this at College. All the info for calculating design current, carrying capacity & fuse ratings in various tables...not hard to get head round. On site guide also has more simplified tables without the complex calcs of regs...I think?!
Must look at this amongst everything else I have to be Reading...
 
Agree with all that.

Wannabe, as far as I have learnt so far, the only sense in which you can say a particular cable size has a particular current-carrying capacity (load) is when its in a particular situation, such as surface mounted in conduit, or in a wall with thermal insulation, buried oin a wall in plaster etc etc. Each of these installation methods will determine how much current any cable can carry safely ...... because ...... the higher the temperature of the cable the higher the resistance of its conductors, and the higher the resistance the higher the temperature gets etc etc. So it's important to get it right. As pushrod, claret and a12 have said, the figures are all in the Regs and in the OnSiteGuide. Hope this helps.
 

Reply to amps carried in cables in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock