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Topic Title: Serial connection of three phase circuits
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Created On: 27 February 2019 12:25 pm
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 27 February 2019 12:25 pm
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Selk

Posts: 29
Joined: 21 April 2018

I have two FCU's (Fan coil units) in the same room. Can these two FCU's (3 phase ) be fed from same cable from the panel located in the another room? Is it acceptable as per codes? or do I need to run separate cables?
 27 February 2019 12:38 pm
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tattyinengland

Posts: 1053
Joined: 23 November 2006

HI Selk - are you in the united Kingdom - your use of the phrase "codes" would imply you may be in America.

In the UK, it would be perfectly acceptable to supply two fan coil units from the same circuit assuming the circuit can accommodate the extra load. I'd certainly install a local isolator to each unit for maintenance and isolation.
 27 February 2019 04:56 pm
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Zoomup

Posts: 6117
Joined: 20 February 2014

What would happen if one unit became faulty and caused the one supply cable to trip off a breaker? Both units would then fail. Would this cause a problem at all?

Z.
 28 February 2019 04:48 am
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Selk

Posts: 29
Joined: 21 April 2018

I mean the three core (Multicore) Power cable running from the panel to the FCU 1 and then from Junction box / Switch Isolator, another cable will be connected to FCU2
 28 February 2019 08:32 am
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Zoomup

Posts: 6117
Joined: 20 February 2014

It is a good idea to have local isolation for each machine for safe maintenance and disconnection. An separate isolator by each machine is good.

Z.
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