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Discuss Tails in three ph fusebox. in the Commercial Electrical Advice area at ElectriciansForums.net

S

-sparky-pl-

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Hi there, Three phase board, 125A isolator, are tails 25mm ok? Shouldn't the neutral be bigger?
Im having EDF monday, and i need to be sure.


Thank you
 
K

kung

  • Thread Starter Thread Starter
  • #2
Hi Sparky-pl
25mm fine some go much bigger 36 etc EDF should know.
Regards
Kung.
 
S

-sparky-pl-

  • Thread Starter Thread Starter
  • #3
Thanks Kung, but the neutral shouldn't be bigger?
 
K

kung

  • Thread Starter Thread Starter
  • #4
Hi Sparky
What you got going into the meter ?
 
S

-sparky-pl-

  • Thread Starter Thread Starter
  • #5
No meter jet, this is new build, 3 x 100A fuses, 3 ph fuse box, tnc-s system.
EDF comming monday to install the meter.
 
K

kung

  • Thread Starter Thread Starter
  • #6
Ok mate i see what your saying 25mm ok for all meters if you have 3 x 100a ! only time it changes is if you have 300a fuses then its 35mm so 100a-to-CT is 35mm unless like some factories they might install a small sub-station outside (400A) and run 50mm tails but you have 3 x 100A so 25mm fine and Neutral is still 25mm.
Regards
Kung.
 
Last edited by a moderator:
J

johnnyb

  • Thread Starter Thread Starter
  • #7
Neutral would be same size as your tails, and if you have 100A x3 incoming board fuses 25mm is ok mate.
 
J

johnnyb

  • Thread Starter Thread Starter
  • #9
Sorry kung, yeh mate, tryin to do 3 things at once here, computer, print some stuff, and listen to missus moanin, imposs don,t yer think.
 
K

kung

  • Thread Starter Thread Starter
  • #10
lol i know how you feel ! i was typing this long reply the other day when there wasnt any replies and by the time i finnished there were 16 replies saying what i typed lol and about an hr ago this other long reply just as i clicked submit the computor crashed grrrrrrrrrrrrr

just tell her the same as i tell my mrs ! threatern her with an rcd test just as eastenders starts ! works every time i had to do it 4 times last week to emmerdale ! that done the trick that and my macaw going for her hair.
Regards
Kung.
 
Last edited by a moderator:
S

-sparky-pl-

  • Thread Starter Thread Starter
  • #11
Thank you guys,

All the best!!!
 
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