100m cable run | on ElectriciansForums
Guest viewing is limited

Discuss 100m cable run in the UK Electrical Forum area at ElectriciansForums.net

Joined
Apr 9, 2013
Messages
4,558
Reaction score
1,228
Location
Market Harborough
Hi,

you know that thread about running 100m of cable on a farm and it works out at approx 70mm.

just thinking out loud here, how would you terminate 70mm into a consumer unit? Clearly you can't, so what would you use? I was going to say a switch fuse but that's not appropriate.

its not a problem I have come across to be honest.

also you would have the same issue at the supply end.
 
Last edited:
Hi,

you know that thread about running 100m of cable on a farm and it works out at approx 70mm.

just thinking out loud here, how would you terminate 70mm into a consumer unit? Clearly you can't, so what would you use? I was going to say a switch fuse but that's not appropriate.

its not a problem I have come across to be honest.

also you would have the same issue at the supply end.
how would you struggle, gland it and be done with it, if there is no space in the board mount into a header or similar
 
I meant you can't terminate it straight into the board so you would have to take it into a suitable enclosure and join in or connect to a smaller CSA CABLE.
like i said a trunking header or adaptable box, the cable size is only to account for vd so doesnt need to be that size for the full length, as long as it is joined properly then there wont be an issue
 
Hi,

you know that thread about running 100m of cable on a farm and it works out at approx 70mm.

just thinking out loud here, how would you terminate 70mm into a consumer unit? Clearly you can't, so what would you use? I was going to say a switch fuse but that's not appropriate.

its not a problem I have come across to be honest.

also you would have the same issue at the supply end.

Ideally you wouldn't be installing it on an mcb at the supply end as this makes for bad practise due to discrimination etc. At the supply end installing a switch fuse and glanding in to this would be an option and at load end in to an isolator and taking appropriate sized tails for the OCPD in to the CCU at the load end.
 
Last edited:
It was a 3 phase supply so the board you choose ensure it has an option of terminal stubs for larger cables or a expansion option to fit a large incomer switch disconnector or mccb ... this is the correct way but many cut corners with adaptable boxes etc and tails to reduce the swa csa.
 
It was a 3 phase supply so the board you choose ensure it has an option of terminal stubs for larger cables or a expansion option to fit a large incomer switch disconnector or mccb ... this is the correct way but many cut corners with adaptable boxes etc and tails to reduce the swa csa.

i thought it was a single phase supply to the barn conversion.
 
I was reflecting on this thread
http://www.electriciansforums.co.uk...l-electrical-forum/102617-100m-cable-run.html

But the same applies if one Phase.. you can fit a 3phase board and single phase it out with a kit if you cannot find a suitable 1ph option - its poor design to be doing de-rating joints outside the board unless you want to go to the expense of the proper kit but then the above option for this case becomes the better of the two.

Standard incoming 100/125 amp disconnectors usually good to 50mm so you fit the more expensive larger switch disconnector or mccb if needing 70mm - this is why they make mccb's etc to take larger cables to allow for such large runs and larger cabling ...
 
Last edited by a moderator:
Reducing lugs (aka pin lugs) are available to make bigger cables fit into smaller holes if the size difference isn't too much and there is room to sensibly terminate the bigger cable in the enclosure.

If extra room is needed to spread the cores at switchgear or bigger boards then a spreader box is used. For smaller boards you have to make your own spreader box using an adaptable box or a bit of trunking.
 
Palm lugs, pin lugs, blade terminals....

[ElectriciansForums.net] 100m cable run
 
I mentioned them in post 7 abeit calling them terminal stubbs but went off on a tangent as some set-ups means they are hard to fit unless you have expansion box you end up with bends too tight and hard up pressured against the case due to the compact designs of some boards but yes deffo the best option if they fit.
 

Reply to 100m cable run in the UK Electrical Forum area at ElectriciansForums.net

Similar threads

  • Question
Are you meaning running two 6mm cables in parallel? This is allowable in UK regs, providing the two runs are exactly the same length and routing...
Replies
3
Views
1K
  • Question
If it is TT then you can use the armour of any of them as CPC but will almost certainly need an up-front delay RCD at the sub-main feed point to...
Replies
5
Views
804

Recommended Sponsor News

Quickwire Now Sponsor ElectriciansForums.net

I am sure you will join me in welcoming our newest sponsors of ElectriciansForums.net - Quickwire! They have decided to join us after seeing you guys discussing their products here. Now we have an expert on board that you can chat to @Quickwire-Sam who will be happy to answer your queries!

[ElectriciansForums.net] Quickwire Now Sponsor ElectriciansForums.net


@Quickwire-Sam said "At Quickwire, we're all about speed, safety, and reliability. We're a family-run business, and every Quickwire connector is proudly made right here in the UK, ensuring noticeable quality. In short, Quickwire is the fastest connection method on the market. Whether you're an experienced electrician or a DIY enthusiast, Quickwire makes electrical connections ridiculously quick and easy. We're passionate about blending British craftsmanship with innovation. If you have any questions or if there's any way we can help, please just ask me!"

Exclusive Forum Offer! Free euro 2024 wall chart for first 10 responses!

Hi everyone,

We have 10 exclusive Uheat EURO 2024 Wallcharts to giveaway for Electricians Forum Members! The first 10 people to reply YES to this thread - I will message and get them sent out to you just in time for this years tournament! GO GO GO

PCBWay Now Sponsor ElectriciansForums.net!!

I hope you will all join me in welcoming our newest sponsor to the forum PCBWay! You can contact their friendly people by sending a message to @PCBWay who will be happy to answer your queries.

Welcome to the community and thanks for your sponsorship!

[ElectriciansForums.net] PCBWay Now Sponsor ElectriciansForums.net!!

PCBWay provides services including PCB Prototype and batch Production, PCB Assembly (SMT), 3D Printing, CNC Machining, PCB Design, Electronics Modules Selling, etc. We are committed to meeting the needs of global makers from different industries in terms of quality, delivery, cost-effectiveness, and any other demanding requests in electronics.

[ElectriciansForums.net] PCBWay Now Sponsor 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

YOUR Unread Posts

Thread starter

Joined
Location
Market Harborough

Thread Information

Title
100m cable run
Prefix
N/A
Forum
UK Electrical Forum
Start date
Last reply date
Replies
12
Unsolved
--

Thread Tags

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top