Uploaded February 2026 | Updated September 2026, 1 week ago
Me and Joe look at a modern 400 volt cable joint to 230 volts supply for a TN-C-S (TNCS) Earthing system. We see how in new cable joints it's almost impossible to lose the combined neutral and Earth connection. We see the Aluminium line conductor and how it is connected within the joint as well as two different ways the combined neutral and Earth conductor can be connected. The broken PEN conductor (PEN - Protective Earth Neutral) it currently a hot topic in the electrical industry with older joints failing across the UK.
See what’s going on inside a cable joint.
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.
00:00 - Part 1 PME cable joint
11:24 - Part 2 Concentric and split concentric cables
Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.
You can follow me day by day on Facebook, Instagram and Twitter lookout for "GSH Electrical”.
▶️ FACEBOOK facebook.com/gshelectrical
▶️ INSTAGRAM instagram.com/p/BrIhZmrAYGDTmjMdb9lUNQodMevqsbDDki3qpQ0
▶️ TWITTER mobile.twitter.com/gsh_electrical
▶️ TikTok vm.tiktok.com/ZMRBLFdhe
#GSHElectrical #Electricaltrainingvideos
Me and Joe look at a modern 400 volt cable joint to 230 volts supply for a TN-C-S (TNCS) Earthing system. We see how in new cable joints it's almost impossible to lose the combined neutral and Earth connection. We see the Aluminium line conductor and how it is connected within the joint as well as two different ways the combined neutral and Earth conductor can be connected. The broken PEN conductor (PEN - Protective Earth Neutral) it currently a hot topic in the electrical industry with older joints failing across the UK.
See what’s going on inside a cable joint.
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.
00:00 - Part 1 PME cable joint
11:24 - Part 2 Concentric and split concentric cables
Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.
You can follow me day by day on Facebook, Instagram and Twitter lookout for "GSH Electrical”.
▶️ FACEBOOK facebook.com/gshelectrical
▶️ INSTAGRAM instagram.com/p/BrIhZmrAYGDTmjMdb9lUNQodMevqsbDDki3qpQ0
▶️ TWITTER mobile.twitter.com/gsh_electrical
▶️ TikTok vm.tiktok.com/ZMRBLFdhe
#GSHElectrical #Electricaltrainingvideos
