It's NOT SWA Cable Feeding Your House Cutout Fuse

What is the cable supplying your 100, 80 or 60 amp cutout fuse in a domestic property?
Concentric and split concentric cable explained - aluminium line conductor and a copper combined neutral and earth conductor in concentric cable. The split concentric cable has and aluminium line conductor and copper neutral and copper earth insulated from each other. We see how a concentric cable can be mistaken for a SWA (steel wire armour) cable coming into the bottom of a domestic cutout.

TN-C-S TN-S
T = Terre N = Neutral C = Combined S = Separate

🕕 Time Stamps - Cut to the action 🕕

00:00 - Concentric cable is feeding your cutout
00:30 - Intake equipment
00:59 - Fuse sizes
01:31 - Electric meter
01:45 - Meter seals
03:00 - Concentric cable
03:07 - Aluminium line conductor
03:15 - Copper neutral earth
03:49 - Pulling the cutout fuse
04:37 - Cutout connections
05:03 - TN-C-S
05:42 - Connection on the meter
06:26 - Split concentric cable TN-S

Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.

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[mikestepz]

Left the financial industry end of 2020, been going to college to study electrical, sent out over 200 emails to companies trying to get a start. Coming up on two years later from leaving the financial industry I have started my adult trainee apprenticeship with a one man band taking me on. These videos and this channel have been vital in learning for me. Thank you so so much to the main guy always in the videos and the whole GSH team. Thank you so much.

[tinytonymaloney]

Well I never, 61yrs old and been in the trade since 1979 and never seen or heard of a split concentric cable. You learn something every day 😎.
The apprentices have it easy nowadays, we never had trainers like you, ours were ones that probably ones that were conscripted in the 50s and were still using valve radio 🤣🤣🤣

[earlyyearslearningisfun]

Massive thanks for all your efforts to create content for the electrical industry 💕

[teyronjayneevans]

That video will help so many new learners. Wish I'd seen it 2 years ago when I first started .

[PJPJ]

Fascinating video. I never knew the name of this type of cable but its application is very useful. I've repaired Apple MagSafe chargers before and they too use a concentric cable. Thank you.

[_chrisr_]

The cable coming into the house I am in now is a concentric cable but without pvc insulated core - the core is wrapped in oil soaked paper and around that is a lead sheath. The lead is the neutral/earth and the central core is line. This arrangement allows the guys working on it to be able to cut into the cable whilst live with plastic tools in order to create a joint. I watched them do just that and it was very interesting.

[GeorgeCox]

Brilliantly clear explanation, as ever. Thank you, Gaz!

[markbradley]

Good Video, however its from the Utopia Earth World (parallel world) where everything is good and proper as it should but most of us watching know we dont live in that world 9 times out of 10 times the cut out /origin of the supply is shonky wiring with old meter tails usually 16mm where the sheath of the double insulated is stripped back too far and the meter is stuck in a position taking up too much space so the new dist board doesnt fit....so a lot of us dont have the time and niether does the customer to wait around for the electricity bods to faff around fixing their end and pulling the
So we steam in, cut the seals, put new 25mm D/I tails from head to meter to new distboard having re arranged the space to accomodate..
Making a better, neater and safer job all around...
Most of the DNO guys arent proper skilled sparks but have a day or so training to fit meters and fuses..
Im not saying everybody is this way but a lot are and care more about a proper safe install then box ticking, ipad tapping form filling, time consuming, logo shirt and hi viz wearing poor grade installing
P.S
And for all the sheeple who will have a negative saying against me about ooooh your breaking the law and rules yeah well so what... my concern is for a good safe job in reality... not a good paperwork exercise ...
And in anycase.... the Cut Out in the video is poor as its on a floaty board not even fixed properly in the white box.... tut tut !

[MervynPartin]

Excellent presentation, both in the field and in the classroom. Never too old to learn something.

[craigmitchell]

It’s worth noting there is 1ph split concentric and 3ph split concentric out on dno networks on the 1ph conductor size you normally will come across 16mm split 25mm split and 35mm split concentric 3ph most of the time I have come across numerous times in 35mm. Split concentric service cable main purpose is to match existing earthing characteristics of the lv network in some areas direct earth or separate neutral earth is the only earthing system available. This type of cable comes into play a lot of the time on service alterations were a 1ph pilc or three phase pilc service is being moved to a different position so to match existing direct earth or separate neutral earth characteristics of the house split concentric is installed and a transitional straight service joint would be jointed onto existing pilc service or split concentric service.

[jamiebourke]

Recently started my apprenticeship last month, all seems daunting at first so hoping I’ll get into the swing of things

[RealEpikCartfrenYT]

It's fascinating to watch how electrical systems work in different countries. When I saw the concentric cable, I immediately thought of coaxial antenna cable because it's made in a similar way

[Fester_]

Good man. Thank you. Simple once we know.

[robg]

TN-C-S …….[PME…. Protective Multiple Earthing]…… [CNE… combined Neutral & Earth]… = standard Concentric Cable.
_———————————————_
TN-S …………[SNE….. SN&E …..Separate Neutral & Earth]… = split concentric cable

[seanbranagh]

Of course the advantage of concentric cables is that from a safety point of view if there is damage to the cable, for example if someone cuts through it with a spade the neutral will be contacted first before the line, reducing the risk of electric shock.
The cable to our consumer unit in our house is split concentric and runs under the garage from the meter box on the outside of the garage.

[SeanBZA]

By me the split concentric cable also always has 2 0.5mm copper wires in the outer as well, used for communications between an indoor display unit that id part of the prepayment system, to communicate data back to the head unit on top of the pole, that is the actual metering and disconnect. The display is powered and communicates over these 2 wires, so that you can top up your prepayment meter easily, but tampering is hard, as the cable will be dead when your credit is exhausted.

[johnburns]

Many will be amazed that the earth and neutral are connected. So a metal cased appliance that is earthed, will be connected to the circuit as you are touching it, and the circuit drawing current.

[ethansellwood]

It's also worth noting that the orange split concentric cable you showed has LSF properties (Low Smoke & Fume) typically black split concentric can't be used inside a property past a certain distance as in the event of a fire, the insulation can give off toxic fumes. This is where orange (LSF) split concentric would come into its element.

[pompeymonkey]

If only the audiophiles knew that their power is supplied through an aluminium conductor! Lols

[dkaloupis]

Thanks to Gary GSH Electrical we are still alive here and most important safe.