Can't find this in any of the regs.

[Lorryload]

I'm newish to electrics, just going through my exams now. Neighbour asked a question which I couldn't answer easily or find out in the regs, wonder if you can help?

He's installing a sink and 3kW heater in his garage. All his sockets run off a ring, he can come off the ring and add a 13A fused switchable spur to run the heater no problem. His walls are fully plastered (yes in the garage). He knows that the connection between the heater and spur has to be heat resistant cable which the instruction guide states, however the heater itself has a bottom and a rear exit for electrics. He's wanting to connect to the spur using this rear exit by burying the cable in the plaster, not have an exposed bottom entry cable. So, his question is.

1) Can he bury the heat resistant cable in the plaster between the heater and spur? Is this allowable? or
2) If the heat resistant cable is not necessary (since it seems to indicate that internal cables may be an option) which cable could he use, e.g. 2.5mm two core + earth, is this heat resistant to the same spec?

Hopefully this makes sense and thank you.

 

[telectrix]

he can bury the cable in the wall, but it must be within prescribed zones and be RCD protected.

 

[Guest77]

I'm newish to electrics, just going through my exams now. Neighbour asked a question which I couldn't answer easily or find out in the regs, wonder if you can help?

He's installing a sink and 3kW heater in his garage. All his sockets run off a ring, he can come off the ring and add a 13A fused switchable spur to run the heater no problem. His walls are fully plastered (yes in the garage). He knows that the connection between the heater and spur has to be heat resistant cable which the instruction guide states, however the heater itself has a bottom and a rear exit for electrics. He's wanting to connect to the spur using this rear exit by burying the cable in the plaster, not have an exposed bottom entry cable. So, his question is.

1) Can he bury the heat resistant cable in the plaster between the heater and spur? Is this allowable? or
2) If the heat resistant cable is not necessary (since it seems to indicate that internal cables may be an option) which cable could he use, e.g. 2.5mm two core + earth, is this heat resistant to the same spec?

Hopefully this makes sense and thank you.

What type? mechano? wooden board? train set or lego? or did you mean electrical installation work?

 

[Pete999]

I'm newish to electrics, just going through my exams now. Neighbour asked a question which I couldn't answer easily or find out in the regs, wonder if you can help?

He's installing a sink and 3kW heater in his garage. All his sockets run off a ring, he can come off the ring and add a 13A fused switchable spur to run the heater no problem. His walls are fully plastered (yes in the garage). He knows that the connection between the heater and spur has to be heat resistant cable which the instruction guide states, however the heater itself has a bottom and a rear exit for electrics. He's wanting to connect to the spur using this rear exit by burying the cable in the plaster, not have an exposed bottom entry cable. So, his question is.

1) Can he bury the heat resistant cable in the plaster between the heater and spur? Is this allowable? or
2) If the heat resistant cable is not necessary (since it seems to indicate that internal cables may be an option) which cable could he use, e.g. 2.5mm two core + earth, is this heat resistant to the same spec?

Hopefully this makes sense and thank you.

The recommendation is that any fixed load of +2KW should be on it's own circuit, think about the loading of the spurs 13Amp fuse I=P/V

 

[telectrix]

What type? mechano? wooden board? train set or lego? or did you mean electrical installation work?

now, now, sarky sod. :christmaswindow:

 

[Lorryload]

c

Try reading the question instead of posting pointless sarcastic answers may help newbies.

The question is can a heat resistance cable be buried in plaster or does it have to be exposed. Not sure what that's to do with Lego.

 

[Lorryload]

Thank you Sir. The Ring is on a RCD so that covers off that.

 

[Richard Burns]

Plaster generally has better heat sinking qualities than air so the cable should remain cooler, unless the heater warms the plaster a lot, in which case the heater is probably faulty.
Is this a undersink water heater you are discussing, because as said above fixed heavy loads should not be connected into the ring to avoid overloading, however an occasionally used sink water heater may be OK, if it is possible to supply it from its own circuit this would be better.

 

[Lorryload]

Plaster generally has better heat sinking qualities than air so the cable should remain cooler, unless the heater warms the plaster a lot, in which case the heater is probably faulty.
Is this a undersink water heater you are discussing, because as said above fixed heavy loads should not be connected into the ring to avoid overloading, however an occasionally used sink water heater may be OK, if it is possible to supply it from its own circuit this would be better.

Thank you Richard much appreciated. The spur is only a metre away too from the heater so sounds like he'll be okay.

 

[Guest77]

Try reading the question instead of posting pointless sarcastic answers may help newbies.

The question is can a heat resistance cable be buried in plaster or does it have to be exposed. Not sure what that's to do with Lego.

It was the comment about "electrics" and yes I am sarcastic