Earth Leakage Query.

[telectrix]

might be having a blonde moment here, but.... if an installation has earth leakage, could this be measured with an earth leakage clamp meter on the main earthing conductor and/or the main bonding conductors as logically, if there is leakage , you would expect the current to travel to earth through these conductors?

 

[mayfair]

Nothing like the old sets LOPTY big and ugly , nice heat in the workshop off the old PL405 valves.

i have a healthy respect for capacitors, ever since working on 1970's colour TVs. when a section of the crude wire wound dropper resistor went o/c. there would be a nice 200v charge left on the smoothing capacitor. the usual method of discharging this before getting bit big style was to use a 10" blade pozidriv screwy. to s/c the cap. to chasssis. still got my old one with little blackened nibbles.

 

[telectrix]

mmmm and the old PL519 with 8kV sitting on the top cap.

 

[mayfair]

Ouch !!!!!!!!!!!!!!!!!!! Showing our age now Tel I was apprentice with Redifusion in 1975 FFS that 36 year ago

mmmm and the old pl519 with 8kv sitting on the top cap.

 

[telectrix]

i was with rediffusion 1972-3. average 18 service calls per day.

 

[mayfair]

Where at m8 ? btw how Mrs Tel mine has test results tomoz ......not happy puppy (me)

i was with rediffusion 1972-3. average 18 service calls per day.

 

[telectrix]

was at the rediffusion depot in stoke. my lady's had the all clear last check up. next one in about 4 months time. fingers crossed.

 

[Mike Me Mate]

That's brilliant! I was looking for a fast and easy way to check if was going to hold. Do most clamp meters have a m/a range?
I defiantly try it next time I change a board. Tip top!

 

[telectrix]

most clamp meters don't have milliamp range. you need a earth leakage clamp meter.

 

[Mike Me Mate]

Are they expensive or can you pick them up in maplins?

 

[telectrix]

not in maplins i don't think . the alphatek 633 is around £65 + VAT. it's about the cheapest going. try ebay.