Would this pass 7th ed regs?

In article ,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

Conductors in parallel is non-trivial in the area of circuit protection
and by the time you've designed and bought all the necessary parts, you
will have spent way more than simply buying the right cable in the first
place.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

"Andrew Gabriel" wrote in message
...
In article
,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

Conductors in parallel is non-trivial in the area of circuit
protection
and by the time you've designed and bought all the necessary
parts, you
will have spent way more than simply buying the right cable in
the first
place.




I'm curious as to why 10mm cable for a shower - unless you have
an excessive cable run length?

Under 16th ed (I assume the OP meant 17th ed?) 6mm encased in a
wall is rated at 32A which would handle a 10KW shower - and I
don't know of many (any?) at that rating.



--
Woody

harrogate three at ntlworld dot com

On 7 Aug, 10:45, wrote:
Would this pass 7th ed regs?

It might pass 7th but I wouldn't be too sure it'd pass 17th.

In article G0t7o.70213$d34.33083@hurricane,
"Woody" writes:
"Andrew Gabriel" wrote in message
...
In article
,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

Conductors in parallel is non-trivial in the area of circuit
protection
and by the time you've designed and bought all the necessary
parts, you
will have spent way more than simply buying the right cable in
the first
place.




I'm curious as to why 10mm cable for a shower - unless you have
an excessive cable run length?

Under 16th ed (I assume the OP meant 17th ed?) 6mm encased in a
wall is rated at 32A which would handle a 10KW shower - and I
don't know of many (any?) at that rating.

32A is a 7.5kW shower.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Woody wrote:

"Andrew Gabriel" wrote in message
...
In article
,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

I'm curious as to why 10mm cable for a shower - unless you have
an excessive cable run length?

Under 16th ed (I assume the OP meant 17th ed?) 6mm encased in a
wall is rated at 32A which would handle a 10KW shower - and I
don't know of many (any?) at that rating.

10.5kW showers are readily available.
They are still not as good as a combi fed mixer, or a pumped system. I
fitted one a while ago and was rather disappointed at the flow of it.
As to the OP, running twin 6mm cables would need 4 cables fitting into
the pull switch - it is difficult enough with 2 cables going in, I think
4 would be near impossible.
Alan.
--
To reply by e-mail, change the ' + ' to 'plus'.

"Woody" wrote in message
news:G0t7o.70213$d34.33083@hurricane...
"Andrew Gabriel" wrote in message
...
In article
,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

Conductors in parallel is non-trivial in the area of circuit protection
and by the time you've designed and bought all the necessary parts, you
will have spent way more than simply buying the right cable in the first
place.




I'm curious as to why 10mm cable for a shower - unless you have an
excessive cable run length?

I'm curious as to why you would need extra protection on two underrated 6
mm2 cables for a shower when you don't need extra protection on two
underrated 2.5 mm2 cables in a ring.

In article ,
"dennis@home" writes:


"Woody" wrote in message
news:G0t7o.70213$d34.33083@hurricane...
"Andrew Gabriel" wrote in message
...
In article
,
writes:
Would this pass 7th ed regs?

No, at least not trivially.

Conductors in parallel is non-trivial in the area of circuit protection
and by the time you've designed and bought all the necessary parts, you
will have spent way more than simply buying the right cable in the first
place.




I'm curious as to why 10mm cable for a shower - unless you have an
excessive cable run length?

I'm curious as to why you would need extra protection on two underrated 6
mm2 cables for a shower when you don't need extra protection on two
underrated 2.5 mm2 cables in a ring.

You _might_ not, but you have to prove it either way.

A 30/32A ring circuit is specifically excepted from being considered as
conductors in parallel, by being tightly specified. No other circuit
is similarly exempted and you would have to go to the effort to prove
it was safe. Buying a length of the right cable would be much cheaper
than having someone qualified do the investigation and proof for you
to submit with the completion certificate.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]