Do YOU Know What Happens to a Circuits Insulation Resistance When the Circuit Length is Increased?

In this video I explain what happens to the overall insulation resistance of a circuit when the circuit length is increased. Often on site we test 3 time a single phase circuits for insulation resistance between line and CPC, neutral and CPC and between live conductors (line and neutral). However currently BS 7671 model forms only have 2 boxes for insulation resistance LIVE - LIVE and LIVE - EARTH and in this video I explain why testing LIVE conductor to EARTH is a more onerous test on the circuit and how the length of the conductors will have an impact on the circuits insulation resistance.

🔵 Do you Know Which Conductors Need to be Connected During the Insulation Resistance Test?   • Do you Know Which Conductors Need to ...  

🔵 Insulation Resistance Test (Includes Line and Neutral Together to Earth and Between Live Conductors)    • Insulation Resistance Test (Includes ...  

🔵 Combined Insulation Resistance Test Line and Neutral Together to Earth & Between Live Conductors    • Combined Insulation Resistance Test L...  

🕐 Time Stamps - Cut to the action 🕕

00:00 - Insulation resistance and circuit length
00:40 - Circuit conductors
01:48 - Very high value of insulation resistance
02:28 - Adding length
03:00 - Resisters in parallel
04:18 - What are we looking for
05:53 - Linking live conductors
07:45 - Earth metal work
10:40 - Bonding in place
10:42 Connection to the source earth

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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