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Topic Title: Using Switched Fuse Spur as an Isolator
Topic Summary: Fuse removed to be considered an isolator?
Created On: 17 February 2016 11:00 PM
Status: Read Only
Linear : Threading : Single : Branch
 Using Switched Fuse Spur as an Isolator   - 0rlan - 17 February 2016 11:00 PM  
 Using Switched Fuse Spur as an Isolator   - 74jools - 17 February 2016 11:16 PM  
 Using Switched Fuse Spur as an Isolator   - mapj1 - 17 February 2016 11:18 PM  
 Using Switched Fuse Spur as an Isolator   - Zoomup - 17 February 2016 11:24 PM  
 Using Switched Fuse Spur as an Isolator   - 0rlan - 17 February 2016 11:31 PM  
 Using Switched Fuse Spur as an Isolator   - mapj1 - 18 February 2016 12:03 AM  
 Using Switched Fuse Spur as an Isolator   - TeesdaleSpark - 21 February 2016 02:54 PM  
 Using Switched Fuse Spur as an Isolator   - Zoomup - 17 February 2016 11:58 PM  
 Using Switched Fuse Spur as an Isolator   - geoffsd - 18 February 2016 01:27 AM  
 Using Switched Fuse Spur as an Isolator   - Tiggywiggler - 18 February 2016 07:54 AM  
 Using Switched Fuse Spur as an Isolator   - peterhoward - 18 February 2016 09:53 AM  
 Using Switched Fuse Spur as an Isolator   - mapj1 - 18 February 2016 01:07 PM  
 Using Switched Fuse Spur as an Isolator   - 0rlan - 18 February 2016 01:42 PM  
 Using Switched Fuse Spur as an Isolator   - peterhoward - 18 February 2016 03:19 PM  
 Using Switched Fuse Spur as an Isolator   - AJJewsbury - 18 February 2016 07:36 PM  
 Using Switched Fuse Spur as an Isolator   - aligarjon - 18 February 2016 07:47 PM  
 Using Switched Fuse Spur as an Isolator   - Zoomup - 22 February 2016 08:06 AM  
 Using Switched Fuse Spur as an Isolator   - 0rlan - 20 February 2016 09:19 PM  
 Using Switched Fuse Spur as an Isolator   - geoffsd - 22 February 2016 11:42 AM  
 Using Switched Fuse Spur as an Isolator   - AJJewsbury - 20 February 2016 09:59 PM  
 Using Switched Fuse Spur as an Isolator   - TeesdaleSpark - 21 February 2016 02:56 PM  
 Using Switched Fuse Spur as an Isolator   - Zs - 21 February 2016 04:36 PM  
 Using Switched Fuse Spur as an Isolator   - sparkingchip - 21 February 2016 04:42 PM  
 Using Switched Fuse Spur as an Isolator   - sparkingchip - 21 February 2016 04:52 PM  
 Using Switched Fuse Spur as an Isolator   - 0rlan - 24 February 2016 04:10 PM  
 Using Switched Fuse Spur as an Isolator   - Jaymack - 25 February 2016 05:20 AM  
 Using Switched Fuse Spur as an Isolator   - peterhoward - 25 February 2016 11:41 AM  
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 17 February 2016 11:00 PM
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0rlan

Posts: 5
Joined: 07 December 2014

Hi guys...

This probably sounds like a pedantic request but it's something I can't find an answer to in black and white.

My company is using a Switched Fused Spur (BS 1363-4) to feed a domestic boiler, and based on Table 53.2 of BS 7671 this device is shown as 'use for isolation'

HOWEVER... I cannot convince the engineer who is writing a maintenance procedure that actually achieving 'isolation' requires the fuse to be removed.

He's using the words 'that's not what the book says' and is insisting that it can just be switched off because the Unswitched Spur in the table specifies ' Remove Fuse to Isolate' and the Switched Spur doesn't

Now common sense obviously counts for nothing against a degree, so I need to find an authoritative written source to show that it's only an isolator if you remove the fuse (to my mind it's just a switch if you leave the fuse in...)

Can anyone help with a definitive written source on this?

Thanks all

Allan

Edited: 17 February 2016 at 11:20 PM by 0rlan
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