Need to extend existing circuit because cooker switch will be moving. I will be adding about 2m of cable. Can I use a cooker outlet plate to extend the circuit and make this accessible in a base cabinet?
You can use a cooker outlet plate if you wish, the plate must be easily accessible for maintenance, inspection and testing.
If the circuit is rated at equal or less than 32A, you could use a blanking plate with correctly rated connection strips in.
If the extended cable/circuit will then have buried cable within walls or floors, there are a number of requirements and regulations to follow.
*Cable must be installed in permitted safe zones if buried less than 50mm within wall or be mechanically protected.
*If cable is buried less than 50mm within wall 30mA RCD protection is also required.
*If a socket outlet is being installed then 30mA RCD is required regardless of method of cable route.
*Chases in solid walls can be no greater than 1/6th of walls thickness (leaf/skin) on the horizontal and 1/3rd on the vertical. //www.diynot.com/wiki/electrics:installation_techniques wall chases part A
Thank you. I thougt it would be ok to extend using an appropriate rated connection unit, but as there will be a new (approx 2m) run to the new cooker switch location and then another 2m from the cooker switch to the new cooker connection plate, I was just a bit concerned about the 3m rule (is there actually a 3m rule?).
3m rule regarding what?
It is recommended that the cooker isolation/control switch is within 2 metres of appliance but not directly above it. (but That would suggest the hob was installed in that location also)
The 2 metre is recommendation, not an absolute rule.
You can get junction boxes that are designed to carry high currents, such as cooker circuits.
eg http://www.tlc-direct.co.uk/Products/AAJB60.html
Please remember that screwed connections must be accessible.
The 3 meter rule is where there is a change in the current carrying capacity. So for example if you were also powering an oven from same supply as hob with 2.5 mm sq cable the 2.5 mm cable would be limited to 3 meters before it was terminated in the fuse connection unit. But if you supplied it with same as supplied isolator then no 3 meter rule. (433.2.2 and 434.2.1 in regulations)
There is nothing wrong in using a 45amp, 50amp or 60amp connector block, provided the supply fuse rating is less than or equal to that of the connector block.
There is nothing wrong in using a 45amp, 50amp or 60amp connector block, provided the supply fuse rating is less than or equal to that of the connector block.
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