[Question] Induction hob plugged in vs hardwired

[bbsash]

A question on safety as well as perhaps CoC. We did a kitchen remodel and as part of that moved the location of the hob and installed a new AEG induction hob. The spec says Max 7.6KW. The electrician installed a new circuit to the DB with a 45A isolator and a 32A breaker. But then from the isolator ran a cable to a standard dual 16A RSA plug socket.

When it came to installing the hob and extractor he plugged in the extractor to one of the plug and the hob he screwed in a standard 3pin plug as well and plugged into the other socket rather than hardwiring it. The two sockets are hidden behind drawers in the new cabinet we installed.

So is this actually safe? And will it pass compliance? Checking online it is not clear if diversity is followed in SANS rules to allow the hob to run off a standard 16A plug. But then with an additional socket and extractor on the same circuit it is not clear that this is really safe on a 2.5mm T+E. Leave alone the fact that I can never have the hob using its power boost feature which is supposed to use 3.7Kw by itself on location. He hasn’t given me a CoC yet for the work done but he is licensed and registered, etc. so kind of trusted his work but now reading about other questions on the forums about hob installations makes me worry.

Plus these two plugs are not on the ELCB. I discovered this today accidentally as my earth leakage tripped due to some reason but the hob kept on going. Are they supposed to be protected behind the ELCB?

[GCE]

A question on safety as well as perhaps CoC. We did a kitchen remodel and as part of that moved the location of the hob and installed a new AEG induction hob. The spec says Max 7.6KW. The electrician installed a new circuit to the DB with a 45A isolator and a 32A breaker. But then from the isolator ran a cable to a standard dual 16A RSA plug socket.

A 16amp normal socket must be on ELU and circuit breaker protecting the socket out can be no bigger than 20 Amp - Pasted a couple of regulations that bounce out at me when thinking what was done on your installation


Extract from SANS 10142-1

6.15.2.2 The anticipated load of a circuit that feeds socket-outlets shall not
exceed 5 kW.


6.15.1.1.5 A stove coupler shall comply with the requirements of
SANS 60309-1 and shall be of dimensions as given in SANS 337.
NOTE 1 Earth leakage protection is not required for the stove circuit when a stove
coupler is used.

6.15.3 Single-phase circuits that only supply socket-outlets rated
at 16 A
Single-phase circuits that only supply socket-outlets rated at not more than
16 A shall
a) have overcurrent protection,
b) use conductors that are rated at not less than 16 A, and
c) if the circuit protection is rated at more than 20 A, use only protected
socket-outlets, with as far as is practicable, discrimination between the
protective devices for the circuit and the protective devices associated with
the socket-outlets. The protective device of a protected socket-outlet shall,
1) have a fixed rated current that does not exceed the rating of the socketoutlet,
2) be mounted next to the socket-outlet that it protects,
3) provide protection against overload currents,
4) provide protection against short-circuit currents, unless short-circuit
protection is provided by a separate device, for example, on the
distribution board,
5) if it needs the protection of a back-up short-circuit device, be marked
with the required or maximum rating of the back-up device,
6) if it protects more than one socket-outlet, be so installed that all the
socket-outlets are connected in parallel, have the same rated current,
and are mounted next to the device, and
7) if it is a circuit-breaker, comply with the requirements of 6.8.2.
©

[Isetech]

I thought these industion hobs were enegry saving, with fast heating,etc.

https://www.aeg.co.za/cooking/hobs/ikb84431fb/#specifications

Something doesnt sound right, 7350 watts/230 = 31.95 amps

Hopefully you never use all 4 plates at the same time on full, the unit is close to the DB if you only use a 4mm sq wire and a 32 amp breaker would be at its limit.

Lucky I saw this post, we busy doing a kitchen revamp and ther ewill be an industion hob fitted, best I install a 25 mm pipe with 6 mm sq wire to the centre island to be on the safe side.