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hi there doing some work with my gaffer just for my own mind a 60 amp fuse at the main cut out with 16mm2 tails well i assume they will be what size of main switch for the consumer unit ? could 100A main switch be put on that ?
 
yeah thanks guys my boss said no isolator what fuse will he pull will he pull both? he’s a bit crabbit when i ask things
 

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you but could 100 amp main switch be used ?
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just for my own mind it the pictures previous what fuse will he pull will he pull both or just one?
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Forgot to finish my last post. I intended to also ask what the job was that was to be carried out?
new main board what fuse will he pull tho
 
I assume the job is to replace that consumer unit, because as it stands, it’s rough.

If you’re upgrading the tails, then the neutral will have to be disconnected. Otherwise, no... pulling the fuse will sufficiently isolate.
Just pull the fuse that’s going through the meter.
The other fuse does appear to supply a cable that goes straight up- possibly to an upstairs flat (?).
 
I assume the job is to replace that consumer unit, because as it stands, it’s rough.

If you’re upgrading the tails, then the neutral will have to be disconnected. Otherwise, no... pulling the fuse will sufficiently isolate.
Just pull the fuse that’s going through the meter.
The other fuse does appear to supply a cable that goes straight up- possibly to an upstairs flat (?).
no upstairs might be next door tho and so he won’t need to disconnect the neutral it’s safe him just pulling the live fuse
 
no upstairs might be next door tho and so he won’t need to disconnect the neutral it’s safe him just pulling the live fuse

You are worrying too much. He is the guy who is on site and can see everything. Watch what he does, and ask questions. If he doesn't want to reply then go elsewhere for your training.

Just one other question - is it actually you doing the job? No offence intended, but your questions come across a bit odd in their manner.
 
You are worrying too much. He is the guy who is on site and can see everything. Watch what he does, and ask questions. If he doesn't want to reply then go elsewhere for your training.

Just one other question - is it actually you doing the job? No offence intended, but your questions come across a bit odd in their manner.
yeah but he’s going to supervise me just little bit knowledge before i do is great he can see i do things at home a iam keen to learn unlike some apprentices this site is great for stuff like that and i do appreciate all the support thanks mate
 
Apart from the fact that you are not allowed to interfere with the DNO's equipment, do you have the correct PPE for pulling a main fuse ?
As a MINIMUM you should be wearing : full face mask to protect your face against showers of molten metal droplets, long (covering your lower arms) insulating gloves, and suitably fire resistant/retardant clothing covering everything else. Is that overkill for just pulling a fuse ? Well for 99.99...% of cases - yes. But it's the 0.0..1% where the service head is old/faulty/poor design/whatever and it goes BANG that you are dealing with. It's no good thinking about putting on PPE after you've had a face full of molten copper, and widespread electrical burns.
And yes, 240V is more than enough to sustain a considerable arc until (hopefully) the 300A or larger fuses blow at the substation.
See Donnie's Accident - http://www.donniesaccident.com if you still need any persuasion that there are risks. OK, his was a different setting, but there is enough energy in a domestic supply to cause similar injuries.
And also see Safety Poems by Don Merrell - SafetyRisk.net - https://safetyrisk.net/workplace-safety-poems/safety-poems-by-don-merrell/ and in particular, "I Could Have Saved A Life That Day".
 

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