Now which cable for this farm job?

[HappyHippyDad]

Just a bit more from this job I've been going on about at the stables..

The chap has 10-15 meters of flex plugged in (just below Consumer unit) taking power to each individual flood. What sort of length of flex is acceptable? I'm going to be changing it all so they are on seperate MCB's in CU, so T&E to seperate switchs just below consumer unit and then can i just use the flex he already has in place, would save him a lot in time and cable? I'd rather be using T&E on a longer run and then into a junction box just before the flood to change to flex to terminate into flood?

 

[zupos40]

What about voltage drop, lighting maximum is now 3% of Uo from supply, I only ever used flexible cables installed in plastic conduit, problem with clipping direct is that it can be damaged and expose either the line or neutral but not the CPC, which could be dangers, you must insure it can not be eaten by live stock or rodents, that why it installed in plastic conduit. Metal conduit (galvanised) is both poisonous and dangerous in event of earth fault (high) Ut touch current for animals. Like other I switch etc light through double pole gird switch, to enable isolation and mechanical maintenance.

 

[shocking_eg]

I only ever used flexible cables installed in plastic conduit, problem with clipping direct is that it can be damaged and expose either the line or neutral but not the CPC, which could be dangers, you must insure it can not be eaten by live stock or rodents, that why it installed in plastic conduit. Metal conduit (galvanised) is both poisonous and dangerous in event of earth fault (high) Ut touch current for animals. .

my Nag would easily destroy a bit of plastic conduit :crazy:

 

[zupos40]

my Nag would easily destroy a bit of plastic conduit :crazy:

Yes probably would, but galvanised is very poisonous to your nag too, I like you would try to remove the possibility of your nag or other animals chewing on the plastic conduit, if she likely to destroy, what would she do to a flexible cable not protected within a plastic conduit.

 

[Silly Sausage]

Why not run cheap, nag life threatening conduit at a high level, out of reach of their chomping mouths, and use stainless steel (or the like) down to the sockets etc...

 

[zupos40]

Why not run cheap, nag life threatening conduit at a high level, out of reach of their chomping mouths, and use stainless steel (or the like) down to the sockets etc...

Black enamel rust in environment like damp wet barns, and as for stainless steel (a) It is mega expensive and (b) a nightmare to thread and bend, it better to hide your plastic conduit runs or use FP200 again install out of reach or as you stated run all power etc high level out of reach of cattle, pigs, horses etc.
Out of reach is the best option.
A Third problem with metal is that under fault condition the Touch Voltage UT and be fatal to live stock.

 

[telectrix]

they're floodlights, so should be easy to run cables out of reach of trigger & friends.

 

[zupos40]

they're floodlights, so should be easy to run cables out of reach of trigger & friends.

So as I originally posted mice, rat, other vermin only problem to consider now.

 

[shocking_eg]

So as I originally posted mice, rat, other vermin only problem to consider now.

SWA or MICC
Or metal conduit

 

[KAS1]

Micc .....................

 

[Silly Sausage]

So as I originally posted mice, rat, other vermin only problem to consider now.

So that saves the cash strapped farmer money on his vermin control.
As for the Ut problem, that could save him slaughter fees as well!

 

[zupos40]

Micc .....................

Yes but cost and specialist tool skills to install, rarely used today, more likely to use FP 200 or similar cable or it seems just flex.

 

[jamie-spark]

Farm installs Are a nightmare with extraneous conductive parts all over the place( farmers putting in steel stations for gates ,pen separators ) olden days it was sleepers
You should see section 705 in BGB and note reg 705.411.1 / 705.422.7 and 705.422.8

Generally we always use ip 55 db units, that are modular for splitting up circuits ( for s type rcds and rcds as they are required to be DP). Mk master seal sockets and swa and fp200. These keep everything nice and dry, as roofs ect get damaged/blown off and not repaired for some time or at all ( in my experience ).
But then we are lucky farmers we work for will spend the cash

 

[Outspoken]

Here is a copy of your picture with some comments added...

 

[Silly Sausage]

Out, like it!
Next time I do a periodic, can I send you a load of pictures and you can code it up for me?
Thanks in advance!!!