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 3 replies
  • Subscribers 36 subscribers
  • Views 670 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

New three phase wiring. Advice needed

Sameer Sher
Hi,
Need some advise on a new three phase wiring.. Thanks in advance..
 
It's a small commercial bakery. They have got a new 3 phase power supply of 200A. The bakery has few three phase machines. Of them are two heavy load ovens and rest are light. One oven takes 80 amps per phase and other 100 amps(these machines will be have to be connected through 25mm SWA cable due to load. Also we will have to install fused isolators near the machine say 100A each to operate) The client won't be running the two machines at one go so the supplied amps of 200A should be enough.
The task now in hand is to connect these machines to supply. I was thinking of few different ways but not sure if it's right
1) one way would be to get a switched MCCB 6 way panel board say with 250A incomer. Distribute the panel into three using MCB- 100A for machine 1, 100A for machine 2 and 100A for distribution board(which will have all other machines, lights etc connected through circuit breakers)
2) Second way would if I can get a heavy load distribution board say 18 way, 250A and connect the machines all in this board. But am confused if I will be able to connect the 25mm SWA to machines in this DB on a 125A MCB. 
These are two ways I was thinking. Please let me know how to proceed and also if there is some other way, please advice.
Thank you again for your time
Parents
  • 0

    I think the MCCB panel or BS88 s fused isolators are your only option - I doubt you'd get bigger than a 63Amp MCB for a 250A Distribuion board. 

    Perhaps go MCCB panel board - SWA - to a metal clad 3 phase appropriately sized Isolator - into which the oven is connected. A commando socket is also a possibility. An isolator is cheaper than a fused isolator. You can rely on the MCCB in the MCCB panel for overload protection. 

Reply
  • 0

    I think the MCCB panel or BS88 s fused isolators are your only option - I doubt you'd get bigger than a 63Amp MCB for a 250A Distribuion board. 

    Perhaps go MCCB panel board - SWA - to a metal clad 3 phase appropriately sized Isolator - into which the oven is connected. A commando socket is also a possibility. An isolator is cheaper than a fused isolator. You can rely on the MCCB in the MCCB panel for overload protection. 

Children
No Data

Community Rules & Guidelines