Wiring timer fan with seperate pull switch

[NeedToSmile]

Need to wire a bathroom timer fan that will operate via a seperate pull switch (independant of the bathroom light) and need some help understanding the layout.

There will be a 3 pole switch outside the bathroom.

Do i:

A = take a 2 core & earth from the lighting circuit (junction box) to the pull switch, then onto the 3 pole switch and finaly a 3 core & earth to the fan.

B = take a 2 core & earth from the lighting circuit (junction box) to the 3 pole switch, then onto the pull switch and finaly a 3 core & earth to the fan.

Many thanks[/img]

 

[RF Lighting]

Take a T&E from the lighting JB (a permanent live and neutral) to the new pull switch, and then a 3 core and earth (permanent live, switched live and neutral) from the pull switch to the 3 pole isolator.

Finally a 3 core and earth from the isolator to the fan.

 

[deko]

IF the fan is to be controlled independently of the light, do you need to have two switches?

Can you not just use one of these inside the bathroom:

http://tlc-direct.co.uk/Products/ASCS3PIF.html

(although in this case the extractor is timed so I guess that wouldn't work, but if you just wanted an on/off via a pull cord switch, would the switch above be suitable?)

 

[NeedToSmile]

Thankyou RF Lighting & deko for your help.

Have just got this bathroom timer fan, (its a 220-240V, 50Hz, 13W): http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100593&ts=63195&id=92561

But the fitting instructions read:

"Wiring should be via a double pole isolating switch with a contact seperation of at least 3mm. The fuse rating should be 1 AMP (uk only)."

My questions are:

A= Using a 3P switch is surely better/safer than a DP switch.

B= Is this (10A) 3P switch suitable or do I need a 6A: http://www.screwfix.com/search.do;j...CSTHZOCFFA?_dyncharset=UTF-8&fh_search=84494#

C= What is this? "The fuse rating should be 1 AMP (uk only)."

Many thanks