move consumer unit
- Thread starter bart1000
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Run a sub-main.
Employ an electrician to do the work for you?
thanks for yr help !! its for budget purpose.
You haven't exacly given us much to go on.
I expect someone will wheel out the crystal ball, and give you a better idea....
I expect someone will wheel out the crystal ball, and give you a better idea....
For costing purposes...
Cable protection...
You need a switchfuse.
- Typically 100A combining DP Isolator & HBC fuse
- Typically made by MEM unless you want very expensive
- Even so they are not cheap
The DNOs service-cutout fuse is to protect their cable.
They allow it to protect meter tails of 2-3m.
You can not use their fuse to protect your 15m run to a CU.
That requires your own isolator & HBC fuse accordingly.
PFC can be 16,000A or 24,000A inside London.
Cable...
You need 25mm 3-core SWA.
- You can use 2-core with steel wire armour as CPC
- Subject to an adiabatic calculation check based on area & k value for steel
- However most people would use 3-core - varies around the country re "local best practice" and price isn't hugely different
You need to adhere to SWA bend radius.
- This is where you may come unstuck re 6x cable diameter minimum bend radius
- Cable zones are 150mm in a wall corner & ceiling, horiz/vert to an accessory (or CU)
- You have to bend up/down a wall, not just around it to meet 6x diameter bend radius
Alternative cables.
Hidden cable requires protection to 526-06-06 (SWA or steel conduit).
Surface cable in trunking can use 6181Y (double insulated singles) or 6491X (single insulated singles).
Some DNO apparently do not like long 6181Y runs and insist on SWA. They actually can not insist on anything beyond BS7671 - a few exceptions governed by ESQW (eg, presence of MEB, safe installation).
An electrician will advise on cable selection when he has seen the route, because that may dictate a certain cable type or provide options.
Price wise, you can cost the various types out to at least get an idea.
Go to TLC Direct online and they will list various prices.
Switchfuse are about £100, 25mm SWA is about £7/m & 6181Y with 16mm 6491X will be about £7/m combined (not much in it).
Cable protection...
You need a switchfuse.
- Typically 100A combining DP Isolator & HBC fuse
- Typically made by MEM unless you want very expensive
- Even so they are not cheap
The DNOs service-cutout fuse is to protect their cable.
They allow it to protect meter tails of 2-3m.
You can not use their fuse to protect your 15m run to a CU.
That requires your own isolator & HBC fuse accordingly.
PFC can be 16,000A or 24,000A inside London.
Cable...
You need 25mm 3-core SWA.
- You can use 2-core with steel wire armour as CPC
- Subject to an adiabatic calculation check based on area & k value for steel
- However most people would use 3-core - varies around the country re "local best practice" and price isn't hugely different
You need to adhere to SWA bend radius.
- This is where you may come unstuck re 6x cable diameter minimum bend radius
- Cable zones are 150mm in a wall corner & ceiling, horiz/vert to an accessory (or CU)
- You have to bend up/down a wall, not just around it to meet 6x diameter bend radius
Alternative cables.
Hidden cable requires protection to 526-06-06 (SWA or steel conduit).
Surface cable in trunking can use 6181Y (double insulated singles) or 6491X (single insulated singles).
Some DNO apparently do not like long 6181Y runs and insist on SWA. They actually can not insist on anything beyond BS7671 - a few exceptions governed by ESQW (eg, presence of MEB, safe installation).
An electrician will advise on cable selection when he has seen the route, because that may dictate a certain cable type or provide options.
Price wise, you can cost the various types out to at least get an idea.
Go to TLC Direct online and they will list various prices.
Switchfuse are about £100, 25mm SWA is about £7/m & 6181Y with 16mm 6491X will be about £7/m combined (not much in it).
reply was in the subject header..
Jason,
Assuming the suppliers main fuse is 100A you would need to employ an 80A switch fuse for the purposes of discrimination.
Assuming the suppliers main fuse is 100A you would need to employ an 80A switch fuse for the purposes of discrimination.
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