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Topic Title: switched fcu
Topic Summary: switch fuse order
Created On: 07 January 2013 10:30 PM
Status: Post and Reply
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 07 January 2013 10:30 PM
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psychicwarrior

Posts: 271
Joined: 18 October 2010

i must be bored to death! :-)

what's the order in a switched fcu - is it fuse first or switch?

i'd go for fuse first, possibly [maybe stretching it] to protect for posibility of over-current in a failed switch and beyond! ?!

(was thinking about fuse carriers in grid switch arrangements too)
 07 January 2013 10:34 PM
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daveparry1

Posts: 6392
Joined: 04 July 2007

Switch first then fuse so that fuse holder contacts are isolated when fuse is being replaced?
 07 January 2013 10:35 PM
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DOUGIE1000

Posts: 4187
Joined: 13 August 2005

switched fuse - a means of isolation with cpd incorporated into isolator.

ie isolator with overload. :-)

-------------------------
Dougie
Power Plus Electrical.co.uk

My mission is to live as long as possible......so far so good!
 07 January 2013 10:40 PM
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daveparry1

Posts: 6392
Joined: 04 July 2007

He's asking about a switched fused connection unit Dougie
 07 January 2013 11:07 PM
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psychicwarrior

Posts: 271
Joined: 18 October 2010

>> Switch first then fuse so that fuse holder contacts are isolated when fuse is being replaced?

yeah i can see that makes sense too.

so with the [unswitched] FCUs i presume folks are supposed to turn the power off (at the CU) before changing... wonder if they do

thanks all for commenting
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