C
chocolate
Just wanted to share something to you all. Rewired a bungalow which had BS3036 stuff and replaced with nice new shiny RCBOs.
Customer called me to say at 7.20am every morning, all the RCBOs would trip off like dominoes.
The electric board accused me of having installed faulty circuits. However having retested, the client insisted the electric board come and inspect their supply.
It turns out that my hunch was very correct and that there was a loose neutral on the pole outside which ( during peak-morning electric use ), the neutral was loaded causing arcing.
In case you didn't know, RCBOs are active devices so will disconnect if there is an imbalance between L and N on either the load side or the supply side.
The dominoe effect is a give away that it is a supply fault. After a week of data logging the supply, they admitted there was a problem with their cables.
The neutral ceramic insulator was burning out. Now there has been no problems since they changed it. I have had my pride and customer confidence restored.
Customer called me to say at 7.20am every morning, all the RCBOs would trip off like dominoes.
The electric board accused me of having installed faulty circuits. However having retested, the client insisted the electric board come and inspect their supply.
It turns out that my hunch was very correct and that there was a loose neutral on the pole outside which ( during peak-morning electric use ), the neutral was loaded causing arcing.
In case you didn't know, RCBOs are active devices so will disconnect if there is an imbalance between L and N on either the load side or the supply side.
The dominoe effect is a give away that it is a supply fault. After a week of data logging the supply, they admitted there was a problem with their cables.
The neutral ceramic insulator was burning out. Now there has been no problems since they changed it. I have had my pride and customer confidence restored.
