applying diversity

[leep82]

Apologies, not on the iphone app it doesnt.

 

[davesparks]

im a plumber, dont get involved with electrics. The clue is 3 bar.

What is 3bar a clue to?

 

[Sparkie30]

What is 3bar a clue to?

water pressure guv

 

[davesparks]

water pressure guv

I'm completely lost now.

You stated that the water pressure at the property is insufficient to run two showers, yet your profile location appears to be a long way from the OPs I think. So I wondered how you knew what the water pressure at his site is?
You might as well tell me that there isn't enough water pressure here to run two of those showers at once.

 

[Sparkie30]

I'm completely lost now.

you shouldn't be lost, you are in guildford

 

[leep82]

Anyways, i have actually given the oven its own dedicated supply so this is immaterial. I still fail to see why though, if i had known the type of oven and say it was only 2kw why it couldnt be plugged into the ring main. The ring main in question is a new circuit consisting only of 4 sockets above the worktops. Only other appliances will be kettle, microwave and toaster ( new kitchen ring is on different RCD to house ring, shocking design again there!! ). Can diversity not be applied also?

 

[leep82]

Doing a little more reading and found a rule of thumb equation to determine the maximum demand with diversity applied.

So the total value of all of the OCPD, multiplied by 0.4 seems an acceptable, as i say " rule of thumb "

So i have :-
3 x 6a circuits
3 x 32a circuits
1 x 20a circuit
1 x 16 a circuit

(6+6+6+32+32+32+20+16) x 0.4

150 x 0.4 = 60amps

As mentioned in the OP i have an 80a main fuse. The above OCPD do not include any electric shower circuits, am i right in thinking that diversity cannot be applied to showers?

 

[davesparks]

Anyways, i have actually given the oven its own dedicated supply so this is immaterial. I still fail to see why though, if i had known the type of oven and say it was only 2kw why it couldnt be plugged into the ring main. The ring main in question is a new circuit consisting only of 4 sockets above the worktops. Only other appliances will be kettle, microwave and toaster ( new kitchen ring is on different RCD to house ring, shocking design again there!! ). Can diversity not be applied also?

Again, it's not a ring main, that's a distribution circuit.

It may be me being old fashioned and not keeping up with the times, but it goes against the basics as I was taught them to feed a cooking appliance via a ring circuit. A separate circuit to feed the cooking appliances is the way I would go.
A ring circuit was, and is, designed as a circuit to supply multiple socket outlets for portable appliances spread over an area. A cooking appliance is a significant load which is on for long periods of time and I feel it is similar in this respect to an immersion heater or similar and should have its own circuit wherever possible.

 

[leep82]

What isnt a ring main?

 

[davesparks]

What isnt a ring main?

The circuit you are describing isn't.
A ring main is a distribution circuit, most commonly an open ring at 11kV
What you are talking about is a ring final circuit (rfc), or ring circuit

 

[leep82]

If you want to be picky i suppose, but i would like to think most people knew where i was coming from. Dont suppose your a member of the grammar police aswell are you

 

[leep82]

Would you also put any other appliances using more than 2kw on there own dedicated supply?

 

[sparksburnout]

I have just come back from the pub having enjoyed quite a few pints of a really nice guest ale. I can only imagine that the OP has done likewise on a regular basis. Dave your patience is worthy of some sort of award. Does the OP do this sort of work on a regular basis????

 

[davesparks]

I have just come back from the pub having enjoyed quite a few pints of a really nice guest ale. I can only imagine that the OP has done likewise on a regular basis. Dave your patience is worthy of some sort of award. Does the OP do this sort of work on a regular basis????

My patience is somewhat binary in its nature, as many around here will have noticed, it's either 0 - saintly or 1 -snapped.

I get the impression he's not been doing it very long

 

[davesparks]

If you want to be picky i suppose, but i would like to think most people knew where i was coming from. Dont suppose your a member of the grammar police aswell are you

Technical accuracy is an essential part of a technical trade such as this, to use incorrect terms suggests a lack of care or knowledge.

Not a member of the grammar police, but using core t terms, units etc etc was somewhat drummed in to me at college studying chemistry, physics and electronics at A level.