Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




26 posts

Geek
+1 received by user: 1


Topic # 136513 29-Nov-2013 18:36
Send private message

I would like to decommission our F&P Paprika free standing oven.
It is on a dedicated 230volt 30amp circuit with a fixed connection (as wired to the standard in 1969/70).

Once the Oven is removed, can the circuit support 1x 15amp socket & 4x 10amp sockets (with an estimated 6kw in use at peak times)?

This is for two different/separate induction plates, a small toaster oven, a dish washer & a spare hot point for other kitchen use.

I can provide model/power consumption spec's if required.

Thanks in Advance!

Create new topic
4731 posts

Uber Geek
+1 received by user: 2668

Trusted

  Reply # 943078 29-Nov-2013 18:43
Send private message

I'm not a sparky, but I think you'd need to have a sub main with circuit breakers rated appropiately for the outlets you mentioned.

This could cost more than just running lighter guage cables from your fuseboard to your kitchen.




Whatifthespacekeyhadneverbeeninvented?


2090 posts

Uber Geek
+1 received by user: 1173


  Reply # 943115 29-Nov-2013 19:37
Send private message

Short answer is maybe.

I'd suggest getting someone to look. It's not as simple as banging on some fittings, there is probably a lot more work in it than you think. you're more than likely going to need work done in the switchboard to bring the new stuff up to the required standard.

You may be holding a can of worms...




Location: Dunedin

 

 


 
 
 
 


1649 posts

Uber Geek
+1 received by user: 369

Lifetime subscriber

  Reply # 943139 29-Nov-2013 20:23
Send private message

What kind of wiring is there in the house? White plastic TPS or black rubber TRS, if it's white TPS then that shouldn't be a problem as long as you change the size of the fuse at the fuse board end.

Now this is where the fun begins, now that you are changing from a 30amp outlet to a mixture of 10Amp and 15amp outlets you must install a suitiable RCD protection, this means fitting an RCD circuit breaker at your fuse board, now been a fuse board from the 70's your now going to be stuck with upgrading the entire fuse board to a modern distrubition board as modern RCD's will not fit on an old fuse board, and depending on the state of the wiring you may need to get a good portion of the house re-wired.

Basically you are about to open a very large can of worms here, best thing you can do it put the can down and walk away.

21995 posts

Uber Geek
+1 received by user: 4650

Trusted
Subscriber

  Reply # 943149 29-Nov-2013 20:51
2 people support this post
Send private message

do it with a subboard that you put the breakers in. There are horrid surface din breaker enclosures that some sparkys will put onto an old phenolic or whatever the later stuff is fuse board, but chances are there is not enough space on it and it will just end up a mess. I have seen 2 houses which have had the old cooktop replaced with a small breaker panel and a few sockets when a gas cooktop was put in its place.

There is all sorts of things they have to do with earth loop impedance on things to make sure it is compliant as well. Poor sparkys having to have all that compliance to deal with. I am glad I have a good sparky as a relative to deal with all that carry on ;)

Im not sure what the maximum that you can have a circuit with power points on it protected at. I seem to recall 25 or 27A from a previous discussion.




Richard rich.ms

110 posts

Master Geek
+1 received by user: 46


  Reply # 944358 2-Dec-2013 20:30
Send private message

iROK: I would like to decommission our F&P Paprika free standing oven.
It is on a dedicated 230volt 30amp circuit with a fixed connection (as wired to the standard in 1969/70).

Once the Oven is removed, can the circuit support 1x 15amp socket & 4x 10amp sockets (with an estimated 6kw in use at peak times)?

This is for two different/separate induction plates, a small toaster oven, a dish washer & a spare hot point for other kitchen use.

I can provide model/power consumption spec's if required.

Thanks in Advance!


Well you can go from a larger gauge wire to a lighter gauge TPE wire OK, but not the other way around.  Therefore the initial 30 amp wiring run probably can be reused (5mm?)  The main issue as mentioned is that the proposed power outlets will not be protected by an RCD as oven feeder circuits usually bypass RCD's on fuse boards (assuming they are fitted).  The fuse rating will also be incorrect for a HP circuit.  I think if you need to ask the question it really does mean you really should get an electrician involved, but its always good to know what you are up for, right?  Good luck.



26 posts

Geek
+1 received by user: 1


  Reply # 944400 2-Dec-2013 21:36
Send private message

Some interesting replies, thank your for your feedback.
OK, so electricity 101; 230V X 30A = 6.9kW of max power can be consumed on this circuit before overloading & 'blowing' a fuse (wire).
Is that a correct statement?

I know the 30A fuse & holder will need to be fully upgraded to the RCD type as the old fitting is too big, and that's OK.

What I want to know; can the EXISTING 30A rated wire (of whatever gauge they used for this type of over range circuit in 1970) be kept in place?
Why does new wiring have to be installed?

AND if it does, can I have the fittings I desire be installed (1x 15A, 3-4x 10A)

YES I will be getting a SPARKY in, just getting one at a time I can be there too...



2090 posts

Uber Geek
+1 received by user: 1173


  Reply # 944410 2-Dec-2013 21:48
Send private message

Whether or not the cable can be reused depends on several things including what it is and what shape its in.

Ultimately, it will probably be replaced and you'll likely end up with 2 circuits.




Location: Dunedin

 

 


6592 posts

Uber Geek
+1 received by user: 493

Trusted
Subscriber

  Reply # 944419 2-Dec-2013 22:15
Send private message

I know the 30A fuse & holder will need to be fully upgraded to the RCD type as the old fitting is too big, and that's OK.


You are confusing MCB and RCD, these are not exactly the same thing, by messing with the switchboard you expose yourself to some serious upgrades to meet standard.

Aside of that the existing cable assuming it was a 4 or 6mm TPS can be retained with a 20A MCB plus any RCD protection and a set of 10A sockets on it, why the 15A though.

Cyril

21995 posts

Uber Geek
+1 received by user: 4650

Trusted
Subscriber

  Reply # 944440 2-Dec-2013 23:16
Send private message

15A for a decent coffee maker, a deep fryer or an arc welder ;)




Richard rich.ms

1991 posts

Uber Geek
+1 received by user: 133

Trusted

  Reply # 955805 21-Dec-2013 13:40
Send private message

richms: 15A for a decent coffee maker, a deep fryer or an arc welder ;)

Mite need a big aircon on the kitchen bench, or a 3kVA UPS to run the sandwich maker.




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^



26 posts

Geek
+1 received by user: 1


  Reply # 955877 21-Dec-2013 15:30
Send private message

Nahh, just it's just a 2.8kw Induction Hob.

Am waiting for the E.Inspector to sign off on the proposed change(s), which might not happen till next year now.
Apparently Gas BBQ's need inspecting too :-P

I'll have to post a photo when done.




26 posts

Geek
+1 received by user: 1


  Reply # 990178 19-Feb-2014 09:53
Send private message

The BILL finally came in last week... $530 with certification.
Traditional Stove gone & Dishwasher in it's place, 2x Induction units on top & a SMART Oven above. 
Photo below





Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

NZ and France seek to end use of social media for acts of terrorism
Posted 24-Apr-2019 12:13


Intel introduces the 9th Gen Intel Core mobile processors
Posted 24-Apr-2019 12:03


Spark partners with OPPO to bring new AX5s smartphone to New Zealand
Posted 24-Apr-2019 09:54


Orcon announces new always-on internet service for Small Business
Posted 18-Apr-2019 10:19


Spark Sport prices for Rugby World Cup 2019 announced
Posted 16-Apr-2019 07:58


2degrees launches new unlimited mobile plan
Posted 15-Apr-2019 09:35


Redgate brings together major industry speakers for SQL in the City Summits
Posted 13-Apr-2019 12:35


Exported honey authenticated on Blockchain
Posted 10-Apr-2019 21:19


HPE and Nutanix partner to deliver hybrid cloud as a service
Posted 10-Apr-2019 21:12


Southern Cross and ASN sign contract for Southern Cross NEXT
Posted 10-Apr-2019 21:09


Data security top New Zealand consumer priority when choosing a bank
Posted 10-Apr-2019 21:07


Samsung announces first 8K screens to hit New Zealand
Posted 10-Apr-2019 21:03


New cyber-protection and insurance product for businesses launched in APAC
Posted 10-Apr-2019 20:59


Kiwis ensure streaming is never interrupted by opting for uncapped broadband plans
Posted 7-Apr-2019 09:05


DHL Express introduces new MyDHL+ online portal to make shipping easier
Posted 7-Apr-2019 08:51



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.