fan and isolator positioning

ineedhelp · Jul 12, 2014

Hi Everyone

Quick intro, I have recently started house bashing due to twice being made redundant first as an auto spark and second more recently a server electrician installing power systems to servers and the likes.

Anyway, A recent call took me to someone bathroom with a ceiling fan fault. Did the usual diagnosis and found fan unit to be faulty. My question is, both the fan (240v) and the isolator are positioned that they are in zone 2. Looking at my trusted greenie it seems that this set up does not conform (if i have interpreted it correctly that is). My dilemma is do I replace fan anyway or report this as not conforming and price up accordingly to correct such.

In commercial/industrial land we always worked on the philosophy " if i don't make the existing installation any worse then go ahead (within reason of course) but, Domestic land is a whole new beast and usually is last man frees all.

any help guys and gals would be much appreciated.

Guest77 · Jul 13, 2014

atm84 said:
Don't believe everything you read on the Internet.

does that include post 42 lol?

Adam W · Jul 13, 2014

I'm pretty sure condensed water vapour is most commonly known as 'water' - 'steam' is the gaseous form of water which is produced when water is heated to 100 degrees Celsius and what was used to power trains.
I don't see how a switch in a bathroom is going to be affected any differently to one in a kitchen; the idea of using a pull switch in the bathroom or switch outside the bathroom was to reduce the risk from operating it with wet hands, not to prevent water ingress. Generally speaking a fan isolator is intended for maintenance, which isn't usually carried out by someone who has just stepped out of the shower.

GMES · Jul 13, 2014

Adam W said:
I'm pretty sure condensed water vapour is most commonly known as 'water' - 'steam' is the gaseous form of water which is produced when water is heated to 100 degrees Celsius and what was used to power trains.
I don't see how a switch in a bathroom is going to be affected any differently to one in a kitchen; the idea of using a pull switch in the bathroom or switch outside the bathroom was to reduce the risk from operating it with wet hands, not to prevent water ingress. Generally speaking a fan isolator is intended for maintenance, which isn't usually carried out by someone who has just stepped out of the shower.

Adam, I will have you know I do some of my best work when I'm naked!!!

telectrix · Jul 13, 2014

ewwwwwww

telectrix · Jul 13, 2014

Adam W said:
I'm pretty sure condensed water vapour is most commonly known as 'water' - 'steam' is the gaseous form of water which is produced when water is heated to 100 degrees Celsius and what was used to power trains.
I don't see how a switch in a bathroom is going to be affected any differently to one in a kitchen; the idea of using a pull switch in the bathroom or switch outside the bathroom was to reduce the risk from operating it with wet hands, not to prevent water ingress. Generally speaking a fan isolator is intended for maintenance, which isn't usually carried out by someone who has just stepped out of the shower.

exactly what i was trying to tell him.

UNG · Jul 13, 2014

atm84 said:
UNG
Steam is created by water vapour condensing. It does not require the water to reach 100c for steam to be produced. Steam is actually invisible water vapour condensing to form tiny water droplets as it spreads into cooler air.

I've had many showers and opened the door and steam has billowed out.

If it req. water to be at 100c then no one would need a fan in the bathroom.

I think you need a science lesson but I see Tel's on the case

atm84 said:
Steam is created by water vapour condensing. Steam is in actual fact invisible water droplets. A shower at 40c can create steam and set smoke alarms off.

You don't know when to quit do you having worked on a few steam producing and using plants they where a lot hotter than 40°C

I did state heat detectors any smoke detectors will have problems with water vapour

Geordie Spark · Jul 13, 2014

UNG said:
I think you need a science lesson but I see Tel's on the case

You don't know when to quit do you having worked on a few steam producing and using plants they where a lot hotter than 40°C

I did state heat detectors any smoke detectors will have problems with water vapour

I used to play with this:

[ElectriciansForums.net] fan and isolator positioning

Now THAT produces steam!

GMES · Jul 13, 2014

So did this

When an Ape's Got to go an Ape's got to go!!

telectrix · Jul 13, 2014

that's not steam, it's a mixture of methane and hydrogen sulphide . bet you daren't strike a match.

shanky887614 · Jul 13, 2014

Adam W said:
I'm pretty sure condensed water vapour is most commonly known as 'water' - 'steam' is the gaseous form of water which is produced when water is heated to 100 degrees Celsius and what was used to power trains.
I don't see how a switch in a bathroom is going to be affected any differently to one in a kitchen; the idea of using a pull switch in the bathroom or switch outside the bathroom was to reduce the risk from operating it with wet hands, not to prevent water ingress. Generally speaking a fan isolator is intended for maintenance, which isn't usually carried out by someone who has just stepped out of the shower.

wrong.

water doesnt boil at 100oC

that is only at sea level, the higher you go the lower the temperature needed, it has something to do with air pressure or something if I recall correctly

telectrix · Jul 13, 2014

there you go

trev · Jul 13, 2014

shanky887614 said:
wrong.

water doesnt boil at 100oC

that is only at sea level, the higher you go the lower the temperature needed, it has something to do with air pressure or something if I recall correctly

It's why astronauts wear pressurised suits. In the absence of atmospheric pressure the boiling point of water lowers. 0 pressure = boiled blood = death.
I remember an experiment on How (google it young uns it was great) Fred Dinage lowered the pressure in a vessel and the water in it boiled at room temp.

shanky887614 · Jul 13, 2014

trev said:
It's why astronauts wear pressurised suits. In the absence of atmospheric pressure the boiling point of water lowers. 0 pressure = boiled blood = death.
I remember an experiment on How (google it young uns it was great) Fred Dinage lowered the pressure in a vessel and the water in it boiled at room temp.

I learnt it off QI