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Thread: Best electrical cable detector?
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8th March 2013, 02:23 PM #1GOLD MEMBER
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Best electrical wiring detector?
Can anyone please recommend a voltage detector that would locate 240v electrical wiring chased into a masonry brick wall, and covered with 12mm gyprock plaster board?
I am about to drill 75mm holes in a wall, and I know there are cables buried near there somewhere. Horrendous cost to repair if I drill through the cableregards,
Dengy
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8th March 2013, 10:50 PM #2SENIOR MEMBER
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The general rule with house wiring is straight up and down, or parallel to the floor, so if you don't drill in those areas you should be alright.
The world is a comedy to those that think, a tragedy to those that feel.
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9th March 2013, 02:32 AM #3China
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For masoary walls I would be lokking at something like a Bosch de tect 150 about $780.00 depending on how well you can haggle
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9th March 2013, 02:00 PM #4
There's a small pen like detector at the big green shed, its yellow with a red plastic tip and a small torch at the other end. I have had a couple over the years and have found them to be fairly accurate and reliable, last one I purchased was about $24-00.
When you locate the direction (vertical, horizontal or angled, put some masking tape at 9eg to the direction of the wire and then mark on it each side where the detector picks it up. Don't drill between the marks
ALWAYS USE AN APPROVED SAFETY RCDC POWER BOARD WITH ANY POWERED TOOLSThe person who never made a mistake never made anything
Cheers
Ray
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9th March 2013, 02:14 PM #5GOLD MEMBER
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thanks rwbuild. I bought one yesterday at JayCar electronics, but it di not work on wiring buried in concrete masonry and covered by gyprock.
The only time I could get it to work was if I actually put it on the toggle button on a light switch or power point, or touched it to an extension cordregards,
Dengy
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9th March 2013, 02:15 PM #6Intermediate Member
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Best electrical cable detector?
My sparkie used something similar to locate a "missing" cable and it got within a few cm ... Not bad.
Wood burns faster when you have to cut and chop it yourself.
~ Harrison Ford
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9th March 2013, 02:23 PM #7
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9th March 2013, 03:07 PM #8
Cheaper pen type have a range of 50mm max, more often about 25mm, so if theres Gyprock over the brickwork the are largely useless. Really intended as a live/dead indicator once you have located the cable, but you check them against something known to be live to ensure battery/detection circuit are working very frequently as they do not fail to safe, i.e. a non live indication may mean theres nothing live in range or it may meanthat the units stuffed, your choice.
I have a Stanley studfinder about 10 years old. There were a few models of these units, basic timber studs, timber and metal studs, timber and metal studs and metal pipes, and the all singing and dancing studs, pipes and power unit which i have. It can be helpfull, but at times when testing it can miss studs, so what else does it miss?
The surest way I know is to put the jol;e where you need it, if you can finish it it without the nasty bang, odour and smoke you got it right, generaaly you will get it wrong so don't do it that way.
Phone linesmen use a signal injector to place a signal on a line then use a detector to trace and identify lines in bundles etc. Mains strength equivalents would work for you, but I don't know if they exist.I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.
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9th March 2013, 03:32 PM #9Member
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Can you look in ceiling space or under floor to see where cables are heading? Sometimes a small battery powered transistor radio gets more static when tuned just off the station and held near hidden power cable. If nothing else works, could you drill the hole through just the plasterboard then gently hit a flat ended punch into the hole to sus out whether there is masonry, cable or open space beyond the plasterboard before venturing further?
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9th March 2013, 04:18 PM #10Intermediate Member
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Best electrical cable detector?
Aldi have one on special next week
Wood burns faster when you have to cut and chop it yourself.
~ Harrison Ford
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10th March 2013, 08:27 PM #11I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.
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