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 7 replies
  • Subscribers 39 subscribers
  • Views 1489 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

Two three phase machines on one circuit

E95

Two isolators out of one MCB, each isolator feeding a three phase machine, with the feed to the second machine being taken from the incoming side of the first machine isolator, effectively a radial circuit without the sockets?

Is this an issue? I understand it's not common practice but I can't understand why it would be classed as unsafe provided the cabling was sized for the maximum load (Both machines on)?

Today a contractor implied this wasn't able to be done, however I can't really find anything in the regs to say so, does anyone have any ideas or is it nonsense?

Regards

Parents
  • 0

    Absolutely Chris, just as you say. It appears that some seem to have a "three phase" disease that blinds them to reality. Radial circuits with more than one point of utilisation are common, and this applies to single and 3 phase installations. If the machines have very significant consumption them dedicated circuits are more common, but a ring distribution circuit around a room full of machines may well be the most economical solution,  with each having a switch fuse as the isolator (obviously all poles). I don't know why these things come up, probably still back in the 14th or even before!

Reply
  • 0

    Absolutely Chris, just as you say. It appears that some seem to have a "three phase" disease that blinds them to reality. Radial circuits with more than one point of utilisation are common, and this applies to single and 3 phase installations. If the machines have very significant consumption them dedicated circuits are more common, but a ring distribution circuit around a room full of machines may well be the most economical solution,  with each having a switch fuse as the isolator (obviously all poles). I don't know why these things come up, probably still back in the 14th or even before!

Children
No Data

Community Rules & Guidelines