Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 2 replies
  • Subscribers 32 subscribers
  • Views 450 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Submain in Singles - why not?

adi_mrok
Hello there, I have a general question. I have noticed that when you have to pull new submain from the main LV panel to local DB people around me tend to prefer using multicore for this purpose. Now I have a situation in the existing building where bending radius of 4c70mm2 is quite a problem in some areas where cable is going to run through so I wanted to use singles AWA 1 core per phase. I heard from a person that he would prefer to use multicore as "he doesn't like singles run like that". And surprisingly it's not the first time I heard it from someone and every time I try to ask what is your reason behind it I always hear something very vague. 


Anyone can explain me what is the main reason people are responding this way?
Parents
  • 0
    Depending where it is you may need to consider the magnetic fields generated if the 3 phases are not well interleaved, (no medical scanners nearby  ?)  but trefoils are quite effective for cancelling most of that if done methodically . Certainly it can be a useful soution to getting out of certain problems.

    And we often use non-armoured  singles for temporary work too, when the cable size is such that an extension lead in 5 core would be hernia inducing to carry across the field - so from about 63 amps upwards.. Just much easier to manouvre into position.

    (a 50m length of 120mm2 single  is quite enough to be honest even with a landrover to pay it out from.)



Reply
  • 0
    Depending where it is you may need to consider the magnetic fields generated if the 3 phases are not well interleaved, (no medical scanners nearby  ?)  but trefoils are quite effective for cancelling most of that if done methodically . Certainly it can be a useful soution to getting out of certain problems.

    And we often use non-armoured  singles for temporary work too, when the cable size is such that an extension lead in 5 core would be hernia inducing to carry across the field - so from about 63 amps upwards.. Just much easier to manouvre into position.

    (a 50m length of 120mm2 single  is quite enough to be honest even with a landrover to pay it out from.)



Children
No Data

Community Rules & Guidelines