What is a sub mains cable?

What is a sub mains cable?

A sub-main electrical circuit can be defined as a circuit connected directly from the main LV switchboard to a sub-main distribution panel or a rising main for final connection of the minor current-using equipment. Cable Sizing Of Sub-Main Electrical Circuits (Working Examples)

Does a sub board need a main switch?

A: No. All conductors of a sub main or a final sub circuit must be connected on one switchboard.

Can I fit a new consumer unit myself?

You can replace your consumer unit without disconnecting the power as long as you’re careful. Also, if you want or need to replace the meter tails to the consumer unit, you must involve the electricity board who will wire them into the sealed meter for you.

Does a sub main need to be RCD protected?

If an upfront RCD was to be fitted, would this have to be a 100mA Time delayed RCD as each flat is protected by their own 30mA RCD and some discrimination between the 2 units is needed….See Also:

	Technical discussion forums
·	Wiring and the regulations
·	Other and general engineering discussions
	Archived categories

Can a RCD be used as a main switch?

1 – can you use the RCD as a main switch for the installation – yes, all RCCB’s that meet BS EN 61008 are rated for isolation.

Can you change consumer unit without rewire?

Yes, as all the circuits will be tested, new & old.

How much does it cost to fit a consumer unit UK?

Although it depends on many factors, the average fuse board replacement cost in the UK is about £350 for a six-circuit consumer unit, £450 for ten-circuit consumer unit, and £550 for a twelve-circuit consumer unit….Consumer Unit Prices.

Type of Fuse Box	Average Price Range
Domestic Switch Fuse	£30-£80

Can you use RCBO as main switch?

Yes, 2 module 2 pole rcbo’s ARE availaboe so can make a very compact single circuit CU for a tight space.