On 24/08/2015 01:45, Fredxxx wrote:
On 24/08/2015 00:59, John Rumm wrote:
On 22/08/2015 17:48, Tricky Dicky wrote:

On most new builds you see the bathroom/en suite fan isolator located
outside the bathroom above the door so they are convenient to switch
from the point of servicing but not convenient to use as the general
on/off switch. Most of these fans are then wired into the lighting
circuit so they come on when the lights are turned on. If you do not
want that and require a seperate switch then if that is going in the
bathroom that will have to be a pull cord type

Its not a hard requirement that a switch in a bathroom be a pull cord
type - (although its certainly common to use pull cords).

http://wiki.diyfaq.org.uk/index.php?...trics#Switches

and will not need to
be a 3 pole type neither will the isolator unless it is being wired
through the light circuit.

The three pole requirement does not come as a result of it being wired
from a lighting circuit, but due to it having three live wires (i.e.
line, switched line and neutral).

Pedantic hat
Don't you mean "line conductors", live, switched live and neutral?
/Pedantic hat

No I don't...

"Line" is the new replacement term is for what was previously called a
"Phase", and in this instance includes the live and switched live wires
but specifically does not include[1] the neutral.

Neutral is considered a live wire, but not a phase or line wire.

See:

http://wiki.diyfaq.org.uk/index.php?...Liv e_wire.3F

[1] See Part 2 (definitions) of BS7671 17th edition.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/