240v Fan in zone 1

[Risteard]

Sorry, just reread your post and realised it was the drawings demanding it in the wrong place.

 

[Jay Sparks]

I wouldn't use any cable outside if it wasn't suitable. Not having read the MI on SY cable, I don't know if the outer sheath offers any UV protection at all. Obviously the screen offers no mechanical protection. But again, use of this cable is "not advised" in the OSG, so really it should not be used at all if we blindly follow the regs as it doesn't conform to ALL the relevant standards! That said, it is part of the new 2357 apprenticeship portfolio and the AM2, so who knows any more?? I would still use it on installations I felt it was right for though!

 

[Andy78]

Ok, so I have had a look and apart form the odd mention in the PUWER and Electrical safety regs, it doesn't actually state they are mandatory, so I will hold my hands up there and say, every day is a school day. This is what I was taught years ago and have never really thought about it since.

But I still think as electricians we need to be making the judgement on whether the equipment is fit for the environment, given all the relevant info in the regs and MI's. If for example the MI's state that the fan should not be fitted in any zone but the BS7671 says it can be, I would always follow the MI's because f anything goes wrong, I think these would make a better case in court.

Well that's fair play to you then. Most of us rely on what we have been taught, and I have been caught out holding quite a few misconceptions from my training days.

BS7671 covers suitability of equipment quite thoroughly. It states that equipment should be selected using the info in the regs and as provided by the manufacturer. If a fan manufacturer stated it was not suitable for zone 1 then obviously you would not fit it as this info alone would mean non compliance with the regs.

If however a cheapy DIY shed light fitting's instructions told me to connect to a connector strip, wrap it in tape, and shove it in the ceiling, I reckon I'd be referring to BS7671 to guide me as to the safest way to put that fitting up.
If the 2.75kW hob fitted with a 1.5mm flex's instructions told me to supply it with a minimum of 6mm cable on a 32A supply, I'd take a good guess that they bung the same paperwork in with all their appliances and refer to cable calcs.

I'm not by any means saying I ignore all MIs, just take some with a pinch of salt. Most instructions from most decent manufacturers are well thought out and well worth taking heed of.

 

[Jay Sparks]

I presume you mean carbon monoxide /CO) a opposed to carbon dioxide (CO2), but how do you know that it will operate correctly/effectively at 500mm? I believe 1 to 3 metres from the appliance in a horizontal plane is suggested.

Yes sorry, my mistake. I just don't know what is real anymore!!lol