Catenary wire

[the pict]

Any one heard of earthing cat wire,
Pict

 

[44ALLAN]

Any one heard of earthing cat wire,
Pict

Only if it's on tray plate

 

[the pict]

I,v heard of earthing the tray(s) but cat wire over head for 25mm armour never, but a guy reckons it,s a must but no metion in the book only a referance to table 42a item 35
P

 

[Geordie Spark]

I,v heard of earthing the tray(s) but cat wire over head for 25mm armour never, but a guy reckons it,s a must but no metion in the book only a referance to table 42a item 35
P

Ask him for the reg. number?

 

[Adam W]

Any one heard of earthing cat wire,
Pict

Nope, that's a new one on me.

 

[the pict]

He is a very clever chap I think I will try to find out his thinking on this, he is ex power station type so could be somthing unique to that
Pict

 

[Geordie Spark]

He is a very clever chap I think I will try to find out his thinking on this, he is ex power station type so could be somthing unique to that
Pict

Yes, I think I would tread a bit carefully here too. Blokes like this could teach you a lot - a bit like our own Engineer54, Tony & Blindnetpaul.

 

[chrish_1977]

Just politely ask him why, then he should tell you his reasons why, can't be fairer than that

 

[44ALLAN]

I,v heard of earthing the tray(s) but cat wire over head for 25mm armour never, but a guy reckons it,s a must but no metion in the book only a referance to table 42a item 35
P

Soz mate I was joking

 

[Engineer54]

I don't think there is any regulatory requirement for earthing catenary wires, but i know it was done for the few we had at the factories i served my time at!!
Again these were metal poles not wood poles. Don't think i've ever had the occasion to run a catenary supported overhead cable, since either!! lol!!

 

[Deleted member 9648]

Years ago I used to earth them for short overheads to garages etc....but in those days it was common practice to strap a bare T/E to the cat. These days it would always be SWA or plastic conduit so there would be no point in earthing the cat wire.

 

[driverman]

At the Electric Boards years ago, we always earthed bare catenary wires. Later though started to use insulated catenary wires.

 

[Engineer54]

I remember one of the medium sized warehouses lighting, being completely wired in a made for purpose high tensile steel wire catenary system, with proper system take-off boxes, the whole nine yards so-to-speak. No idea if such systems are still available or still used. Can't remember ever having any problems with the system during the time i was there!!

Pretty sure that the catenery system was fully earthed too.

 

[cobrauk]

If it can become live because of what you are installing on it, then the answer would have to be yes it needs earthing

 

[somersetsparks]

We always used to earth the catenary with 4mm when it was attached to metal poles, You won't find a specific requirement to do it though.