Jumpy Guy
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| posted on 28/4/06 at 01:49 PM |
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garden wiring question- additional daft questions!!
Guys,
we're wiring some lights etc in a garden.
There is a main feed to a control panel, which has a control system
this feed is a wire armoured cable...
my question is -
i'm assuming that i can run wire armoured cable with no trunking. i.e. striaght in the ground.
Assuming the standard Type P 500mm buried and marked with marker tape, is this ok?
And i know that my local building control officer needs to inspect etc ;-)
[Edited on 2/5/06 by Jumpy Guy]
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jono_misfit
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| posted on 28/4/06 at 02:12 PM |
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Make sure you use a propper IP rated gland when terminating the armoured cable. Sounds daft, but lots of people seem to use indoor gland then wonder
why they've got shorts.
Been ages since ive worked with a trenched cable, but think you need to use a bed of sand under the cable.
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rusty
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| posted on 28/4/06 at 03:56 PM |
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Think trench depth ay be 600 now.
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nitram38
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| posted on 28/4/06 at 05:35 PM |
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Also ensure the circuit is protected by an RCD. Residual Current Device. With a 30mA trip. This is a requirement for all external wiring or out
buildings. It will protect you from electric shocks.
Martin (IEE 16th Edition Electrician 236 Pt III)
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Jumpy Guy
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| posted on 28/4/06 at 06:16 PM |
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thanks guys..
the 600 depth is only for allotments etc..
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Confused but excited.
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| posted on 28/4/06 at 06:21 PM |
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Should also be covered with concrete copings with the elect. hazard warnings cast in on the top and the yellow warning tape layed above that.
ie:
sand bed
suitably rated armoured cable
copings
hazard tape
500mm of soil etc.( not including turf )
and of course all conection methods suitably rated for their location as previously stated.
That's a proper job, that is.
[Edited on 28/4/06 by Confused but excited.]
Tell them about the bent treacle edges!
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nitram38
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| posted on 28/4/06 at 06:25 PM |
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As long as it is at least 500mm deep and has an rcd plus electrical marking tape, you will be ok.
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Browser
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| posted on 29/4/06 at 07:04 AM |
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Or just do what Alan Titchmarsh used to do on Ground Force, run some standard flex through a length of garden hose
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nitram38
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| posted on 29/4/06 at 07:12 AM |
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quote:
Originally posted by Browser
Or just do what Alan Titchmarsh used to do on Ground Force, run some standard flex through a length of garden hose
RCD protected though!
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Confused but excited.
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| posted on 29/4/06 at 02:37 PM |
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quote:
Originally posted by nitram38
quote:
Originally posted by Browser
Or just do what Alan Titchmarsh used to do on Ground Force, run some standard flex through a length of garden hose
RCD protected though!
This is not good advice.
You should only use suitably rated flex for low voltage lighting ie; 12 - 24 volts.
[Edited on 29/4/06 by Confused but excited.]
Tell them about the bent treacle edges!
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JoelP
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| posted on 29/4/06 at 02:51 PM |
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the rcd makes it less bad but armoured cable is always going to be safer.
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Jumpy Guy
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| posted on 29/4/06 at 05:47 PM |
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Plan is-
230 V AC main feed to panel- 2.5 armoured, 500 mm down, haz. tape, laid on pea shingle, then sand.
24 V DC supplies to lamps - 1.5 armoured, as above.
RCD to each 230/24 transformer
only question left - part of the 2.5 armoured is directly embedded into concrete. - i dont have to run conduits or transfers, do i?
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nitram38
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| posted on 29/4/06 at 07:21 PM |
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quote:
Originally posted by Jumpy Guy
Plan is-
230 V AC main feed to panel- 2.5 armoured, 500 mm down, haz. tape, laid on pea shingle, then sand.
24 V DC supplies to lamps - 1.5 armoured, as above.
RCD to each 230/24 transformer
only question left - part of the 2.5 armoured is directly embedded into concrete. - i dont have to run conduits or transfers, do i?
Yes!
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Lawnmower
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| posted on 30/4/06 at 09:48 PM |
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or run it above ground in a conduit atached to your fence wall etc.
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Jumpy Guy
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| posted on 1/5/06 at 06:03 PM |
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last question-
if i run armoured cable, propely clipped and saddled, along a wall, does it have to be in conduit?
if so, is plastic trunking ok, since the cable is armoured?
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nitram38
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| posted on 1/5/06 at 07:02 PM |
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quote:
Originally posted by Jumpy Guy
last question-
if i run armoured cable, propely clipped and saddled, along a wall, does it have to be in conduit?
if so, is plastic trunking ok, since the cable is armoured?
No it can be clipped along a surface without any protection. You may want to protect it if it is likely to be banged alot.
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JoelP
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| posted on 1/5/06 at 08:41 PM |
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remember uv light will degrade pvc sleeving over time, make it brittle and prone to cracking. A cheap plastic trunking will protect it.
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nitram38
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| posted on 1/5/06 at 11:08 PM |
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quote:
Originally posted by JoelP
remember uv light will degrade pvc sleeving over time, make it brittle and prone to cracking. A cheap plastic trunking will protect it.
SWA cable is made to resist this. PVC twin and earth etc is not.
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Jumpy Guy
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| posted on 2/5/06 at 02:00 PM |
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another 'Last' query-
I have 230/12 V transformers buried to supply some lights in the garden..
the cable from the transformer to the light fitting is 2 core water resistant cable..
I'm hoping that this doesnt need any form of protection or depth.... only 12 V DC
from what i can see, the legislation only covers the mains side, once its come up from the 500 mm deep transformer, the 12v side can be run along the
surface to the lamps?
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Browser
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| posted on 2/5/06 at 02:43 PM |
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quote:
Originally posted by Confused but excited.
quote:
Originally posted by nitram38
quote:
Originally posted by Browser
Or just do what Alan Titchmarsh used to do on Ground Force, run some standard flex through a length of garden hose
RCD protected though!
This is not good advice.
You should only use suitably rated flex for low voltage lighting ie; 12 - 24 volts.
[Edited on 29/4/06 by Confused but excited.]
I can see I've got to stop being sarcastic when I reply to posts, or at least post a warning when I am so being
I was kidding for goodness sake! Every time Mr Titsmart and co used to pull this stunt it made me want to shout at the telly. The cable to my
shed is SWA buried at least 500mm down with sand and cable run marking tape atop it. One of these light years I'll actually connect the bugger
and have mains lights in my two sheds
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Confused but excited.
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| posted on 2/5/06 at 07:18 PM |
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Sorry if I ruffled feathers. This was not my intention.
I too find it annoying when tits on the telly are allowed to pull stunts like that.
It's not like they don't have sparks on set who should know better!
I realise that you were being somewhat tongue in cheek, but someone without any electrical knowlege wouldn't. Hence my reply.
Perhaps I should have worded it more tactfully.
Browser, please accept my unreserved apologies. 
[Edited on 2/5/06 by Confused but excited.]
[Edited on 2/5/06 by Confused but excited.]
Tell them about the bent treacle edges!
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Peteff
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| posted on 2/5/06 at 07:56 PM |
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have mains lights in my two sheds
Your name isn't Jackson is it Browser?
Fertang Fertang Biscuit Barrel Two Sheds Jackson
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Jumpy Guy
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| posted on 2/5/06 at 09:00 PM |
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Group hug!!
Now that we're all happy and smiling-
question- can someone confirm that the 12 V DC wiring to the garden lights doesnt need conduit ...
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nitram38
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| posted on 2/5/06 at 09:57 PM |
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12V wiring requires no conduit as there is no shock hazard.
Mechanical protection is another thing.
Building site supplies are 55V to earth, so 12V is well below that level.
[Edited on 2/5/2006 by nitram38]
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Browser
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| posted on 3/5/06 at 06:58 AM |
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quote:
Originally posted by Confused but excited.
Sorry if I ruffled feathers. This was not my intention.
I too find it annoying when tits on the telly are allowed to pull stunts like that.
It's not like they don't have sparks on set who should know better!
I realise that you were being somewhat tongue in cheek, but someone without any electrical knowlege wouldn't. Hence my reply.
Perhaps I should have worded it more tactfully.
Browser, please accept my unreserved apologies.
[Edited on 2/5/06 by Confused but excited.]
[Edited on 2/5/06 by Confused but excited.]
No feathers out of place mate, I was just a bit suprised that's all. Most of the time a smiley at the end of a thread indicates non-serious
content
quote:
Originally posted by Peteff
have mains lights in my two sheds
Your name isn't Jackson is it Browser?
Fertang Fertang Biscuit Barrel Two Sheds Jackson
No, my name is not Tarquin Fintimlimbim Fertang Fertang Biscuit Barrel Two Sheds Jackson, it's Kevin Phillips BONGG
I've got two sheds 'cos we live in a single-garage house and I need somewhere to store all of my crap, hence we have an 8'x6'
garden shed and a 12'x8' garage store
Oh, and I've got a lean-to down the other side of the house for storing bicycles and timber.
[Edited on 3/5/06 by Browser]
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