Basic electrical wiring help plz

El Gringo · 30 Mar 2010 at 15:46

I'm trying to wire up a basic extractor fan system, but having very basic knowledge of the wiring trends, I'm confused by what's in front of me.

What's bothering me, is that the black cable is marked with an N on the box, and the blue with an L, I odn't want to have to start swapping cables around and blowing a new fan. Can someone who knows tell me where to stick the cables?
Thanks

Swifty55 · 30 Mar 2010 at 16:06

From what I can tell;

Brown - Blue
Blue - Black
Earth to Brown.

But how are you planning to switch it on and off?

SB118 · 30 Mar 2010 at 16:08

RTFI ?

El Gringo · 30 Mar 2010 at 16:10

SB118 said:
RTFI ?

Thanks for the helpful suggestion, unfortunately the instructions are generic for a range of their extractors. THanks though, appreciated.

Abraham · 30 Mar 2010 at 16:20

the brown, black and grey (middle 3) are for 3 phase power, I'd imagine you could just use one of these to your Brown (Live) but I'm not sure. Blue to Blue (neutral), there is no earth presumably because it's an enclosed plastic system?

RobH · 30 Mar 2010 at 16:23

Typically extractor fans have 3 wires:

1x Permanant Live
1x Switched Live
1x Neutral

Abraham · 30 Mar 2010 at 16:24

RobH said:
Typically extractor fans have 3 wires:

1x Permanant Live
1x Switched Live
1x Neutral

this one has a built in switch (that's what the white wires are I presume)
other than that it has 3 phase live and a neutral

RobH · 30 Mar 2010 at 16:31

Abraham said:
this one has a built in switch (that's what the white wires are I presume)
other than that it has 3 phase live and a neutral

That makes sense, brown, black and grey for 3-Phase and a blue neutral connection. The connector on the left with 2 white wires is a switched live and is unused. Like you said, you probably can just use the one phase and neutral.

Blue -> Blue
Brown -> Brown
Tape up the earth.

lookitsjonno · 30 Mar 2010 at 16:34

ignore

RJC · 30 Mar 2010 at 16:35

Is there not a wiring diagram stuck on any of the panels. Do you have a make to check there website

Swifty55 · 30 Mar 2010 at 16:36

How can you connect blue to blue when blue states it's live?

Abraham · 30 Mar 2010 at 16:39

Swifty55 said:
How can you connect blue to blue when blue states it's live?

blue isn't live, it's neutral. In both the lead and the extractor wiring
has been the standard for the past 6 years.

Swifty55 · 30 Mar 2010 at 16:46

Abraham said:
blue isn't live, it's neutral. In both the lead and the extractor wiring
has been the standard for the past 6 years.

I know it's standard for the past 6 years, im just replying from what the OP said...

El Gringo · 30 Mar 2010 at 16:47

Swifty55 said:
From what I can tell;

Brown - Blue
Blue - Black
Earth to Brown.

But how are you planning to switch it on and off?

Works, but is slow, I don't think that that's the correct way. I have a standard on/off switch, nothing fancy.

The wiring instructions on the leaflet are

The middle one is supposed to refer to my model.

THanks for the help guys

anything I don't mind · 30 Mar 2010 at 16:51

blue -> blue
brown -> brown
earth -> thin grey ?

am i wrong ?

Would i have caused power cut ?

RobH · 30 Mar 2010 at 17:00

There is no earth on this, don't hook it up to anything (earth is green or green/yellow or a metal fixture on the casing if it is metal). Can you tell us what the two bigger white wires are connected to on the fan? is it a switch or speed controller?

Swifty55 · 30 Mar 2010 at 17:02

Ofcourse there is earth on it.

SB118 · 30 Mar 2010 at 17:03

Swifty55 said:
Ofcourse there is earth on it.

Why? Looks double insulated to me.

D.Roberts · 30 Mar 2010 at 17:04

I normaly just poke em in random orders till it turns if it dont ever turn then you know ya got em wrong once

.

sorry

not funny, any ways i have no idea im still waiting to get mine fitted and i aint gonna try and do it tbh as it will go pop probably tho i did wire up a load of cnc parts via 240 last year but meh.

good luck.

ZG002 · 30 Mar 2010 at 17:15

Swifty55 said:
Ofcourse there is earth on it.

There is not.

blue to blue and brown to brown.

slap your earth in a connector block out the way, In future when you seriously don't have a clue don't "quick to the internet" but "quick call a sparky"