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I'm in a vineyard. There is a 300m buried SWA from the ccu direct to a 2 gang socket.
I'm getting 247V across N and L at the ccu.... But at the socket I'm getting 100V across E and N and 147 across L and N.
Continuity as a radial tested ok
IR All over 500 M
Please list possible issues here. Thank you.
 
B

Bobster

Are there any loads attached at the time of measuring?

What were the continuity results and how did you measure them?

300m is a long way, for what I presume if connecting directly into a socket, is going to be <= 2.5mm SWA.
 

Pete999

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Arms
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I'm in a vineyard. There is a 300m buried SWA from the ccu direct to a 2 gang socket.
I'm getting 247V across N and L at the ccu.... But at the socket I'm getting 100V across E and N and 147 across L and N.
Continuity as a radial tested ok
IR All over 500 M
Please list possible issues here. Thank you.
What size SWA?
 

marconi

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Mentor
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How did you check end-to-end continuity? Is the SWA two core or three core?

First thought is a broken neutral or SWA/CPC somewhere along the length of the cable so am surprised your radial continuity checks are ok.
 
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  • Thread Starter Thread Starter
  • #9
Are there any loads attached at the time of measuring?

What were the continuity results and how did you measure them?

300m is a long way, for what I presume if connecting directly into a socket, is going to be <= 2.5mm SWA.
It's 6mm SWA
WAS GETTING 2 ohm continuity r1+r2
Measured with L and N cables removed from socket.
 
  • Thread Starter Thread Starter
  • #10
How did you check end-to-end continuity? Is the SWA two core or three core?

First thought is a broken neutral or SWA/CPC somewhere along the length of the cable so am surprised your radial continuity checks are ok.
It's 2core, using armour as cpc
6mm
 

marconi

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Mentor
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Did you measure 2Ohms for Rn + R2? ie: the same as R1 + R2?

Assuming 2.9mV/A/m volt drop for 2 core 6mm2 core SWA, R1 + Rn is circa 0.0029 x 300 x 2 = 1.74 Ohms.

Please could you describe more the wrong N bus bar wiring?

:)
 
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