Roofing Bolts as Earthing studs

[jim1976]

Hi, all

Can anyone send me or direct me to website that as info on using roofing bolts for earthing stud ?

I work in a factory that is using the SWA for earthing (which I know is ok but with the bad glanding not so sure) and all banjo,s are held down with roofing bolts, now I worked at a power station for 2 1/2 years and this was a big no no due to the metal reacting and making bad earth connections. the boss here wont have it so need proof they need changing.

cheers

Jim

 

[Silly Sausage]

Googling "Bimetallic (galvanic) corrosion" should throw up something you can use.


This looks like a good introduction to the subject...
http://www.google.co.uk/url?sa=t&rc...sg=AFQjCNF-J3K0DspfUJxLitwO3LuXc8-M8Q&cad=rja

 

[telectrix]

never had a problem. it's brass to steel, so what. the brass of the gland is in contact with the steel armour anyway. if the atmosphre was damp/corrosive, then that steel would corrode anyway.

 

[shanky887614]

if he is a moaning bugger ask him to order in brass bolts and nuts, banjo's are brass afterall

 

[telectrix]

and after some hairy-arsed industrial spark has sheared off a few, he'll go back to roofers, which i hate for this purpose simply because they have heads designed so as to not fit any screwdriver known to man. far better to use hex nuts and bolts.

 

[shanky887614]

and after some hairy-arsed industrial spark has sheared off a few, he'll go back to roofers, which i hate for this purpose simply because they have heads designed so as to not fit any screwdriver known to man. far better to use hex nuts and bolts.

have you never used pozi head roofers?

 

[jim1976]

Googling "Bimetallic (galvanic) corrosion" should throw up something you can use.


This looks like a good introduction to the subject...
http://www.google.co.uk/url?sa=t&rc...sg=AFQjCNF-J3K0DspfUJxLitwO3LuXc8-M8Q&cad=rja

after looking at the table it would appear that they don't corrode together. does it make them the right thing for earthing tho ???

 

[telectrix]

their purpose is to connect to steel, so they're fine in that respect.

 

[telectrix]

have you never used pozi head roofers?

never seen them. just them with the cross slots.

 

[shanky887614]

never seen them. just them with the cross slots.

 

[Rockingit]

I have a love/hate with this subject. I use brass for the job whenever possible, simply as it stops people from moaning, but there's a back-up box of roofers in the van for when I run out. But I have still yet to see anything to convince me that to use galvanized steel is 'wrong'. For a start, it's a heck of a lot cheaper than brass!!!

 

[shanky887614]

I have a love/hate with this subject. I use brass for the job whenever possible, simply as it stops people from moaning, but there's a back-up box of roofers in the van for when I run out. But I have still yet to see anything to convince me that to use galvanized steel is 'wrong'. For a start, it's a heck of a lot cheaper than brass!!!

should be using bolts instead of roofers anyway.

roofers are pressed heads, bolts are machined or whatever.

in otherwords, ive seen a lot of rooferd with the heads sheared off but 8mm bolts, never

 

[krisfire09]

A good tool for roofers is a Phillips with a bit of the end sawn off, works a treat on the roofers with a cross on the head

 

[shanky887614]

A good tool for roofers is a Phillips with a bit of the end sawn off, works a treat on the roofers with a cross on the head

should be using a pozi2 mate instead of a philips.

why is there so many different types anyway?

ph0,1,2,3
pz0,1,2,3
then
phg etc who carries all these bits with them honestly?

 

[krisfire09]

Yea that's the one pal , il still be getting the different shapes and sizes confused in 10 years time

 

[Andy78]

should be using a pozi2 mate instead of a philips.

why is there so many different types anyway?

ph0,1,2,3
pz0,1,2,3
then
phg etc who carries all these bits with them honestly?

Me.
I have PZ0,1,2 and 3 in VDE drivers in my main box. Around a hundred different heads of all sorts that fit in my ratchet driver, PZ, PH, Torx, Allen, small sockets etc, and also a full set of security bits. Hardly takes up any space at all and invaluable sometimes.

I have always found the best tool for roofing bolts is your largest flat driver.

 

[shanky887614]

Me.
I have PZ0,1,2 and 3 in VDE drivers in my main box. Around a hundred different heads of all sorts that fit in my ratchet driver, PZ, PH, Torx, Allen, small sockets etc, and also a full set of security bits. Hardly takes up any space at all and invaluable sometimes.

I have always found the best tool for roofing bolts is your largest flat driver.

I have pz0,1,2. ph0,1,2 in vde
torx drivers as well and the usual multi bit sets a long with my trusty rachet set

 

[guest119]

Me.
I have PZ0,1,2 and 3 in VDE drivers in my main box. Around a hundred different heads of all sorts that fit in my ratchet driver, PZ, PH, Torx, Allen, small sockets etc, and also a full set of security bits. Hardly takes up any space at all and invaluable sometimes.

I have always found the best tool for roofing bolts is your largest flat driver.

Yep, everybody has a big yellow or a big red which occasionally needs a look at a grinder.

Boydy

 

[jaypp]

I have always found the best tool for roofing bolts is your largest flat driver.

20 pence piece and pliers/grips anyone?

 

[Rockingit]

Just out of interest, what are people using to bolt tray together with?