DaveEscos

Guys

I need to extend power from my main garage.. across an alley way to a second garage

below is a diagram for ease of explaining

now the alleyway floor is concrete... what can I hire to create a 'trench' in the ground, accross the alley way, so I can lay some armoured power cable leading from my garage to the new garage?

obv once the trench has been dug.. i will refill with concrete.. but need a tool/machine that will create a decent indent for me to lay the cable

im assuminmg this is the best way to get power to the new garage





cheers

Taz

Is the alley way your property????

DaveEscos

dont worry about that

GARETH T

floor cutter,,, disk cutter

Taz

If you have a 9" grinder then just buy a diamond blade for it, dig dig dig til yer hearts content...lol. I got my 9" er(oooer) from Screwfix and it has done me proud.

The DIVA

iTrader: (3)

I would,Do you have a scanner to check for existing buried services ? are you local authority registered as a contractor ?

I`d be careful mate,it could land you in a whole world of shit if anything goes wrong and you know how much people love to sue each other nowadays...

DaveEscos

its a pretty old alleyway, im sure nowts underneath it

GARETH T

you will have too CAT the ground mate

Simon

I like your style

simon

richj

There are specialist contractors who do "trenchless ducting" they use a
thing called a mole. They'll put a duct way underground without having to dig it up at all.

The DIVA

iTrader: (3)

That`s exactly what i thought....

Imagine my suprise......

RsDarren

iTrader: (1)

Hi dave,

If you go to the HSS tool hire website and type in 'Concrete ring saw' It will bring it up. It should do the job, thinks about Ł75 a day? and it cuts roughly 10" deep, that should get through the layer of concrete.

You will have to dig the rest of the depth needed yourself.

Putting a duct in now would be a good idea from garage to garage as you can then pull in more cables etc. in the future without digging up again.

It should be buried 450-600mm below the surface, and you should also place some 'warning electric cable below' tape in the trench. The diameter of the duct depends on what size cable you will be installing ( plus a bit more for future cables).

You will be fine to pull in the cable yourself, but you will need to discuss with your electrician what size cable you require.

THE OTHER OPTION....

To run it from rooftop to rooftop but that will also depend on what traffic goes down the alley way, if high sided vechiles go down the alley then it would catch on the cable and problems arise!!!!!!

Hope that's helped a bit???
Darren

Cowboi

if your thinking about having anything like a phone line down there or an alarm then run 2 seperate ducts through.

dont forget to run it off an RCD as its going outside.

RsDarren

iTrader: (1)

Yeah well done cowboi forgot that, mean't for more power in the future.

DaveEscos

darren and all.. cheers

err.. RCD!?

Mr S1

iTrader: (2)

Need an RCD box so it won't trip the house if the garage blows. Box is about Ł80. When laying the armour cable you can't just put concrete over the top of it as the lime will eat the rubber away and corrode the cable. Need to lay plastic tubing in the concrete and thread the armour through that.

Cowboi

recidual current device. (spelt something along them lines)

what r u planning on running in the garage electrically wise?

u talkin about some lights and a radio?
or a big fuck off compressor?

cossiegreg1

i can see this ending in tears!

DaveEscos

only want some lights tbh.. nowt amazing!


ooh builders.. now see my concrete thread!

cossiegreg1

it wont be that if you go thru a 9" gas main or water main
No TBH honest mate, water and gas SHOULD be deeper than what you are going.

bigwelshlad

yes mate im a builder but too sloshed to inderstand what you want at the moment

andre_k

iTrader: (2)

dave, go through with a diamond blade, make a v shaped mini trenchabout 4 inches deep, lay steel armoured cable, thencover with 'crete. job done

pmsl at the talk about being registered contractors and CAT ing the ground. hes laying a bloody armoured cable, not digging for foundations!!!

bud-weis

you wouldn't beleive the amount of different services underground though!!

i've seen many many excavations, with gas/water/electric/cable tv all running alongside/on top of each other

it's best to do it properly

Mr C

iTrader: (2)

Step1 are you PART `P` registered? no? Walk away
Seriously its a ball ache now to do anything electrical, new fuse board if it doesnt meet requirements, RCD on your garage ring and armoured cable in conduit and taped for flagging set in the ground at a minimum depth etc etc.
To get through the concrete a 9" diamond grinder and chisel bit in a percussion drill if its not to deep concrete, or "Kango" if its severe, chop out enough to get your shovel in easily though, bury it deep enough in piping and yellow elec tape and stone and concrete over again
you thought about hanging it on tension wire between the two garages? Is it your alleyway?

Series1Dry

You need to make sure the cable suppying the garage at the moment is going to be big enough to carry the extra load. The new supply must be R.C.D protected, which cost me Ł20 and a couple of Ł for an enclosure (plus vat) a couple of days ago, not Ł80 as someone said. If the board in the original garage has an R.C.D in it then you do not need another to protect the new wire going to the new garage, providing you come off the R.C.D side if it's a split board. Same goes if the original garage is R.C.D protected in the house, you do not need another one to protect the new garage.

Check with neighbours surrounding the alley if they don't mind you digging it up. It's surprising how many people kick up a stink for no reason when they don't know about it.

TrevCannon

There wont be anythink to hit while cutting out a 4in gap out


Maybe 4'foot deep gap

dojj

iTrader: (3)

wouldn't it be better to run new cable from the house out to the garage?
that way you don't need to worry about spurring it off the garage you've got?
what if it's not up to spec etc problems don't need to arise then

you also might think baout getting one of them tester things to poke into the ground to make sure there isn't anything there
if you use one of them cutters you can just cut about an inch or 2 down but about a foot wide so you can make a fairly wide trench just in case there is something else in the way
get a pick axe or something to dig it all out and as others have said, you should really lay it deep enough down so that no one pokes a pole throuigh it

DaveEscos

guys, I only want to put lights in this garage! maybe two at max!

I was kind of thinking of running armoured / protected power cable.... with a plug on the existing garage side, plugged in to a socket with one of those circuit breakers..and the socket on the new garage so I can just plug the lights in to it.


This new garage is just one of those metal ones you get for about Ł1500.. just to keep the car out of view and out of the shit weather! hence why this power is just for lights.. no power tools or anything like that

NoshST24

Come off of a spare way in you existing fuseboard using a 40amp mcb, run an swa (Bout a 6mm 3core) to the garage. Terminate it in a Garage Board which has a RCD as an incomer. It will also have a 6 and a 16amp mcb. Run the lights from the 6 amp mcb and if you want you will be able to put a couple of sockets on the 16amp mcb using a radial circuit.

TrevCannon

I think if they came to do that they would see its been reconcreted or do you mean a lil cnuting chav with a pole

dojj

iTrader: (3)

i can imagine all sorts of instances mate
pikey with a tent pitches up in the back garden and BANG he gets a new hair do

if it is just to run a few lights then wire the lights up to run off of a plug and run an extension cable from garage to garage every time you want to use them
simple and no calluses