Brown/Brown twin and earth.

[GBDamo]

Looks very professional when used for switch drops but...

And I am braced for impact..

How do you know which is feed and return?

Installed a 12 gang grid switch and used Brown/Brown and when wiring up the switches was wondering if there is a trick to knowing which is which.

Was a bit of a faff but sorted it during dead testing today but thought, why isn't one core distinctively marked, or maybe a different colour, say blue?

 

[James]

just remember that the left hand brown is always the feed, easy when you know how!!

p.s. just in case, please don't take this too seriously guys and girls.

 

[GBDamo]

just remember that the left hand brown is always the feed, easy when you know how!!

Well don't I feel like a fool..

Hang on, what happens if...

 

[Taylortwocities]

How do you know which is feed and return

It doesn’t matter. A bit like a ring final, deciding which leg is feed out and which is the return.
If it bothers you, don’t use brown/brown, use brown/blue.

 

[davesparks]

Looks very professional when used for switch drops but...

And I am braced for impact..

How do you know which is feed and return?

Do you need to know?

Generally this cable is used for the drop to a single switch, or one switch on a multi gang switch, so as long as one is in the common terminal and the other in L1 it will work. There is nothing requiring the feed to be in common or switched live in L1 (if there was then 2 ways wouldn't work very well)

 

[littlespark]

Is a problem if you wire the entire house in brown/ brown....

See “mistakes” thread for details

 

[telectrix]

Is a problem if you wire the entire house in brown/ brown....

See “mistakes” thread for details

bell it out, sleeve one in blue, sorted.

 

[GBDamo]

Do you need to know?

Generally this cable is used for the drop to a single switch, or one switch on a multi gang switch, so as long as one is in the common terminal and the other in L1 it will work. There is nothing requiring the feed to be in common or switched live in L1 (if there was then 2 ways wouldn't work very well)

Other than half the switches being on/down and half on/up.

 

[Andy78]

I always use the brown that's next to the cpc as the switched line.

 

[davesparks]

Other than half the switches being on/down and half on/up.

Is that a joke or a serious comment, I can't tell?

 

[Let me think]

Don't know about anyone else I would simple sleeve the brown with brown for the SL. Nice and clear or you could be boring and just label tag the SL.

 

[GBDamo]

Is that a joke or a serious comment, I can't tell?

In part.

It matters that the feed is in the com to me, it's just pride.

Yes, you can flip the switch once it's all been powered up, or reterminate it.

I just like to have it right before energizing.

 

[Mark Wright]

It's like this with 2 plate wiring, you just end up with all browns at a switch.

 

[MJPD29]

Used all the time here. I'm fact its very unusual to use brown/blue for a switch here. Sometimes one shade of brown is darker than the other. If not, takes 2 mins to bell it out. I don't really understand why it isn't used across the water to be honest it is the correct colour rather than having to sleeve blue leading to lazy people not doing so.

 

[Risteard]

Used all the time here. I'm fact its very unusual to use brown/blue for a switch here. Sometimes one shade of brown is darker than the other. If not, takes 2 mins to bell it out. I don't really understand why it isn't used across the water to be honest it is the correct colour rather than having to sleeve blue leading to lazy people not doing so.

Completely agree. It should be mandatory. No-one here would dream of using brown & blue for a switch drop.

 

[Pretty Mouth]

Looks very professional when used for switch drops but...

And I am braced for impact..

How do you know which is feed and return?

Installed a 12 gang grid switch and used Brown/Brown and when wiring up the switches was wondering if there is a trick to knowing which is which.

Was a bit of a faff but sorted it during dead testing today but thought, why isn't one core distinctively marked, or maybe a different colour, say blue?

If you must use brown/brown (pointless IMO), then there is indeed a trick. The writing stamped on the flat T+E sheath is in the same orientation, on the same side right down its entire length. You can figure out which conductor is which from that.

 

[GBDamo]

If you must use brown/brown (pointless IMO), then there is indeed a trick. The writing stamped on the flat T+E sheath is in the same orientation, on the same side right down its entire length. You can figure out which conductor is which from that.

Genius, and obvious.

 

[davesparks]

In part.

It matters that the feed is in the com to me, it's just pride.

Yes, you can flip the switch once it's all been powered up, or reterminate it.

I just like to have it right before energizing.

But you said half of the switches will be on at the top, and the other half on at the bottom.
That's got nothing to do with whether the feed is in the common or L1, the switch works exactly the same either way.

The switch will be upside down if it is connected incorrectly so that it is operating between the common and L2.
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Completely agree. It should be mandatory. No-one here would dream of using brown & blue for a switch drop.

Do you have twin brown in every type of cable over there?

I've only ever seen it in T&E type cable,

 

[James]

Only in twin and earth, multi core is normally phase colours, or either white or black with numbered cores.

 

[Risteard]

But you said half of the switches will be on at the top, and the other half on at the bottom.
That's got nothing to do with whether the feed is in the common or L1, the switch works exactly the same either way.

The switch will be upside down if it is connected incorrectly so that it is operating between the common and L2.
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Do you have twin brown in every type of cable over there?

I've only ever seen it in T&E type cable,

Just T&E. You can get a four core flex with brown, black, blue and green/yellow which is useful for dual element immersions though.