Outdoor supply

[Nick1982]

Hi everyone 

Just Been in my garden which has a 12volt lighting system .  Supply is r c d fed from lighting circuit in my sun room. Was installed before I moved in .  

I Want to install new 12v system and when I started looking the supply cable is fed underground in flexible water hose .  Butyl flexi cable is used .  Has anyone used this practice before ? I know swa is the way to go or a proper conduit but do you think this in safe ? Regs just say give mech protection .  Thoughts would be appreciated 

thanks 

 

[Nick1982]

Obviously I meant 230 supply is fed in hose 

 

[roys]

Obviously or hopefully a DIY job, come across it before when following DIYers, You are right SWA properly glanced is the way to go.

 

[Nick1982]

I know lol , there is a few ways to do this job . I don’t even know if they have gone down 600mm to lay the cable. They might of done I don’t know 

if it was laid in proper conduit or ducting I would be tempted to leave it as it would have enough mechanical protection !

I am going to install a techmar plug and play system but might have to re think it now and put a new cable in .   Couple of days work instead of 2 hours haha 

 

[roys]

Yip I have certainaly put non armoured and armoured cable in ducting before.

As far as I'm aware and I'm sure our more learned members will confirm the 600mm rule is only a guide, for example if it is a field that gets ploughed then go deeper, if it is under a wee footpath in a pack garden then the 600mm depth is not required.

 

[Nick1982]

Obviously or hopefully a DIY job, come across it before when following DIYers, You are right SWA properly glanced is the way to go.

 

[Nick1982]

Yip I have certainaly put non armoured and armoured cable in ducting before.

As far as I'm aware and I'm sure our more learned members will confirm the 600mm rule is only a guide, for example if it is a field that gets ploughed then go deeper, if it is under a wee footpath in a pack garden then the 600mm depth is not required.

I was actually on elec at work regs course today and looked in the regs and sure it said 600 . Was only skim reading so might  of been 450 .  I’m industrial back ground so a little rusty on outside supplies etc lol 

think the cable route goes under stones and pathway but not 100% ! 

I’m still in touch with the person who we bought house off so might ask him if he installed it lol 

 

[Murdoch]

I was actually on elec at work regs course today and looked in the regs and sure it said 600 . Was only skim reading so might  of been 450 .  I’m industrial back ground so a little rusty on outside supplies etc lol 

Rather bizarrely BS 7671 has absolutely no fixed recommendations for burying cables .........................

Another major failing IMHO

 

[Nick1982]

Rather bizarrely BS 7671 has absolutely no fixed recommendations for burying cables .........................

Another major failing IMHO

I’ve just been looking at the depth and it was a 100mm in hose pipe.  The trench run isn’t that bad so going to rip it out tomorrow ! Think I’m going to do down 450mm with SWA . Seems ok ? 

 

[Ardet R]

100mm deep? that is quality work for a hose pipe run, normally about 10mm deep for maximum damage potential.

450mm deep SWA bedded in sand and with warning tape a spades depth deep above it sounds a good plan.

600mm is normally only necessary where the land above is being dug up regularly.