4mm radial 20 amp breaker

[Bozza]

Hey guys just a quick question. Doing a rewire on my property and was wondering if it was ok to wire the power In a radial 4mm with 20 amp breaker. I know it's usually a ring on a 32 but I heard the regs will soon change to incorporate the 4mm radial. Will it still pass on test though at the moment?

 

[Guest 004]

4mm radial on 20 amp is fine m8

 

[RWJ]

Fine,

You can use 2.5mm radial on a 20a.. So 4mm is fine

 

[Electricalserv]

Why go 4mm when 2.5mm is well and truely sufficient

 

[telectrix]

you can fit 32A on a 4mm radial as long as there is not catastrophic derating

 

[Guest 004]

volt drop maybe

 

[RWJ]

Why go 4mm when 2.5mm is well and truely sufficient

He likes the extra challenge in making 2 lots of 4mm off in accessories!!!!

 

[telectrix]

or futur5e3 xpaqnsion

 

[Bozza]

Cheers guys. Girlfriend wants all the fancy led lights everywhere too. Mains voltage or lv. What's best apart from saving energy. Heard lamps don't last that long on mains voltage type.

 

[Guest 004]

you can fit 32A on a 4mm radial as long as there is not catastrophic derating

yep up to 47.72 metres, for a load not exceeding 10Amps, but on a 32amp MCB

 

[telectrix]

why 10A???

 

[telectrix]

a very good reason for using 4mm is that you can't buy stranded 2.5mm. the solid stuff you buy now is pants. try pulling it through joists when it's just come off the van at -10degrees.

 

[Guest 004]

If the load was 32amp then the max distance is 17 metres

 

[telectrix]

why 17meters? volt drop?

 

[pushrod]

or futur5e3 xpaqnsion

liquid lunch and tea eh Tel?

 

[telectrix]

nah. her indoors was bashing me ears while i was typing.

 

[SPARTYKUS]

Bozza

you can put it on a 6A MCB if you really want to.