16mm T+E for Loft Extension, (en- suit shower. )

[sparkyjohn1]

Personally I would never protect a 6mm on a 50 Amp M.C.B . 40 Amp MAX...!! Over compensation,, I don't trust diversity

Mr Safe,, .

 

[davesparks]

Damn you Dave! I was just getting ready for a bit of fun then. You've only gone and blimmin spoiled it!

I carefully tried to word it so as not to spoil the fun, just stoke the fire a bit

 

[sparkyjohn1]

Plus Ambient Temperature,, -- Cable ran in a loft, full of insulation,,, Middle of Summer,,, South East coast of England,,, Man, the temperatures are sweltering,,,, gotta be 100 degrees plus...!!!

 

[D Skelton]

Personally I would never protect a 6mm on a 50 Amp M.C.B . 40 Amp MAX...!! Over compensation,, I don't trust diversity

Mr Safe,, .

It's got nothing to do with diversity mate. A shower is a single item of current using equipment with a fixed load. No diversity applicable.

This is about the relationship between I[SUB]b[/SUB] and I[SUB]z[/SUB], and in this situation, I[SUB]n[/SUB] doesn't come in to it other than selecting an appropriate method of short circuit protection (I[SUB]a[/SUB]). Think about it

Plus Ambient Temperature,, -- Cable ran in a loft, full of insulation,,, Middle of Summer,,, South East coast of England,,, Man, the temperatures are sweltering,,,, gotta be 100 degrees plus...!!!

I said correction factors allowing.

 

[ipf]

anyway why the hell would you have 16in and out anyway?

even if its smothered then you can get away with 16mm+ to pull cord then 10mm to shower.

besides clamp the shower and I doubt it will pull rated current.

most people never had shower on max setting and it would take a long time for cable to heat up if it was undersized.

when people used to bypass there meters do you think they used 16/25mm of course they would probanly use flex or 2.5 or something easy to get

I'd put a mixer in for the shower ............save getting mixed up with the cable sizes. Either that or it'd be bleedin' tight in that pull switch.:smile5:

 

[sparkyjohn1]

Ambient temp is a correction factor.??

 

[davesparks]

Personally I would never protect a 6mm on a 50 Amp M.C.B . 40 Amp MAX...!! Over compensation,, I don't trust diversity

Mr Safe,, .

Diversity is irrelevant to the point!

The question is why would you not protect a 6mm with a 50A mcb if the rating factors permit for the Ib?

You are not coming across as being mr safe here, all you appear to be doing is wasting your customers money on unnecessarily oversized cables.

 

[D Skelton]

Ambient temp is a correction factor.??

Correction factor, rating factor... Same thing

 

[sparkyjohn1]

Listen, bud,, I'd Rather Do a full Install on a property.. safe in the knowledge that every cable is more than sufficient for the job in hand..... You can't fault me for that,,, I will include the plans for the job the next message. (proper estate agent drawings.....)... Heck,, I've installed many a dual consumer unit,,, one for lighting,, one for everything else,,, 4 R.C.D's in total,,, Big Houses down here in Kent,,, not a 2 up 2 down property...!!.. Please don't patronise me,,

 

[D Skelton]

Listen, bud,, I'd Rather Do a full Install on a property.. safe in the knowledge that every cable is more than sufficient for the job in hand..... You can't fault me for that,,, I will include the plans for the job the next message. (proper estate agent drawings.....)... Heck,, I've installed many a dual consumer unit,,, one for lighting,, one for everything else,,, 4 R.C.D's in total,,, Big Houses down here in Kent,,, not a 2 up 2 down property...!!.. Please don't patronise me,,

Who was that directed at? Me or Dave? I'm not being patronising, I hope

safe in the knowledge that every cable is more than sufficient for the job in hand

Shower pulls 45A, cable is good for 47A. Ergo sum: cable is more than sufficient for the job in hand