Would I still need a gland for the tails and earth on this TT system?

[HappyHippyDad]

The installation is TT.

The meter box has been moved by the DNO. The tails will now be >3m so I will be fitting a switch fuse. I was planning on removing the DP switch in the switch fuse and replacing with a 100mA S type RCD. I would have put one in place of the main switch in the CU so this seems like a better idea as it will give greater protection to the tails as well.

My question is, do the tails and main earth still need to enter the main consumer unit through a gland or could they just go in through one of the knock outs? I always use a gland to keep them secure as if the tails ever came loose inside the CU the main fuse would not trip, however in this case the RCD would trip, so is the gland necessary?

 

[Carlosfandango]

Why wouldn’t you? End of the day it gives you the proper IP rating, and you’ll probably have a gland in your van anyway? I’m not clued up on TT systems but for the sake of a few pence, I’d be putting a 32mm ct gland in.

 

[Dustydazzler]

For the price of a tails gland just use one imo...

Or I guess you could just bring the tails through the same knock out as the cables if it’s easier

 

[HappyHippyDad]

For the price of a tails gland just use one imo...

Or I guess you could just bring the tails through the same knock out as the cables if it’s easier

Why wouldn’t you? End of the day it gives you the proper IP rating, and you’ll probably have a gland in your van anyway? I’m not clued up on TT systems but for the sake of a few pence, I’d be putting a 32mm ct gland in.

It's purely logistics, not the cost of one gland. Without going in to detail it would be far easier and neater to use a knock out.

 

[Dustydazzler]

It's purely logistics, not the cost of one gland. Without going in to detail it would be far easier and neater to use a knock out.

As the tails will be rcd protected , I see absolutely no issue with taking the tails via a KO

 

[Strima]

No problem using a knockout however I just like using the glands as it makes a neat entry and helps to keep the tails in place to stop untoward movement in the main switch terminations.

 

[happysteve]

How are you going to earth the armour, if you don't use a gland? (by which I mean an SWA gland, rather than a compression gland). The armour is an exposed-conductive part, and needs to be earthed.

 

[davesparks]

How are you going to earth the armour, if you don't use a gland? (by which I mean an SWA gland, rather than a compression gland). The armour is an exposed-conductive part, and needs to be earthed.

The OP makes no mention of SWA

 

[HappyHippyDad]

How are you going to earth the armour, if you don't use a gland? (by which I mean an SWA gland, rather than a compression gland). The armour is an exposed-conductive part, and needs to be earthed.

Sorry Steve, I should have been more precise with my wording. I'm using tails nor SWA. I don't think I've ever glanded off SWA without the correct gland

 

[happysteve]

Apologies, the fault is mine. You didn't mention SWA, I don't know why I assumed it. Brain was on auto. My bad, sorry.

As you were...

 

[Ian1981]

Regulation 531.3.5.3.2.201 is the regulation that is applicable here

 

[Risteard]

I would always advocate the use of a tails gland. I would also always advocate the use of an S-type RCCB upfront of the distribution board(s) in TT systems.

 

[Midwest]

Is it because a bespoke gland could not fit in the space you have available?

Fitted a couple of these;

32mm IP66 Tail Kit Insert c/w Strain Relief - Flame Retardant | Wiska (WKTKS32)

Not as robust as a gland, but suitable for tight space (don't fiddle with cables, was fitted, or else it tears up the seal.

 

[HappyHippyDad]

Is it because a bespoke gland could not fit in the space you have available?

Fitted a couple of these;

32mm IP66 Tail Kit Insert c/w Strain Relief - Flame Retardant | Wiska (WKTKS32)

Not as robust as a gland, but suitable for tight space (don't fiddle with cables, was fitted, or else it tears up the seal.

Thanks for that Midwest, only just seen it. I haven’t seen them before and they look pretty good.