R1 R2 on Radial circuit

[TheCodboy]

Just installed a small length radial circuit. Total length from board no more than 2 meters. Halfway along is a FCU and a double socket at the end. Linked line and earth and tested at the socket and got a R1 R2 reading of 0.10 ohms,hit the switches to confirm polarity and the reading stays the same. Am i missing something here? surely i should loose continuity and the meter should go full scale, just like when testing R1 R2 on a lighting circuit? Am i having a proper brain freeze moment here??

 

[Pete999]

Just installed a small length radial circuit. Total length from board no more than 2 meters. Halfway along is a FCU and a double socket at the end. Linked line and earth and tested at the socket and got a R1 R2 reading of 0.10 ohms,hit the switches to confirm polarity and the reading stays the same. Am i missing something here? surely i should loose continuity and the meter should go full scale, just like when testing R1 R2 on a lighting circuit? Am i having a proper brain freeze moment here??

What switches are you talking about Codboy? you could have the wrong polarity?

 

[TheCodboy]

What switches are you talking about Codboy?

On the double socket itself

 

[Pete999]

On the double socket itself

Where exactly have you connected L to cpc? only you mentioned you tested at the socket

 

[TheCodboy]

Linked line & earth at the CU. Fly lead in with the circuit live and the earthing bar.

 

[The Ghost]

Yeh its brain freeze

 

[Pete999]

Linked line & earth at the CU. Fly lead in with the circuit live and the earthing bar.

DIS the cpc frpm earth bar, short out L and cpc, test again.

 

[TheCodboy]

DIS the cpc frpm earth bar, short out L and cpc, test again.

Tried that. Disconnected the live from the mcb, earth from the earth bar and connected into connector strip. Still the same.

 

[Pete999]

Tried that. Disconnected the live from the mcb, earth from the earth bar and connected into connector strip. Still the same.

Have you got your test probes in the right holes?I presume you are using one of those plug top type units

 

[TheCodboy]

Have you got your test probes in the right holes?I presume you are using one of those plug top type units

I was using one of those,then took the socket out and tested straight onto the screws at the back. I thought my plugin was broken.

 

[Pete999]

I was using one of those,then took the socket out and tested straight onto the screws at the back. I thought my plugin was broken.

So lets get this straight Conductors joined at CU, your testing between the earth and L at the back of the socket, and you are trying to prove continuity by switching the on off switch on the socket, all correct so far?

 

[Octopus]

Turn the FCU on - my guess is that you have connected the 2G socket to the load side of the FCU...

 

[Pete999]

Turn the CFU on - my guess is that you have connected the 2G socket to the load side of the FCU...

Well that's the right way isn't it? I believe what he has done is test the R1+R2 directly at the cable entry to the socket and tried to prove continuity by switching the socket on and off when he has effectively bypassed the switches altogether.

 

[Toneyz]

so you have connected the live and earth of the radial in a connector block the FCU is switched off ,nothing plugged in to sockets put low ohm test between L & E got 0.10 ohms took one lead off meter still showing reading not gone into open circuit have you not got a selection to keep reading on display for limited time/delay

 

[Octopus]

Well that's the right way isn't it? I believe what he has done is test the R1+R2 directly at the cable entry to the socket and tried to prove continuity by switching the socket on and off when he has effectively bypassed the switches altogether.

Why would you have a 2G socket downstream of a FCU on a simple radial?

What is the purpose of the FCU?