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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#41
Posted to sci.electronics.repair
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circuit breaker overheat - Caution!
On 2017/02/03 2:41 PM, Jon Elson wrote:
Had two circuit breakers do something odd at home. One tripped, and I assumed somebody had a space heater and a hair dryer on at the same time or something. Then, a breaker for my computer room tripped when I turned on a laser printer. No unusual loads that I haven't done a hundred times before. I unplugged the laser printer, thinking it might have given up the ghost. When I reset the breaker, it was noticeably warm, which seemed odd, as it was not feeding a heavy load. The laser printer and everything else was just fine. It took a couple hours for the breaker to cool. I can't remember for sure if the breaker that tripped earlier had also been warm, but it might have. So, anyway, it seems these breakers developed poor contact after just staying turned on for several years, and needed the contacts cycled to wipe them clean. I have some other breakers in the shop that are used as shutoffs for various machines, and they never do this, I guess because the contacts are exercised routinely. Jon It is not the breaker per se that was overheating here, it was the breakers contacts to the power bus! I suggest you take that breaker out (safely!!) and check for signs of overheated junction pins on both the breaker wipers and the bus tab. Had this happen to a friend and it could have been nasty if they hadn't noticed it. John -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
#42
Posted to alt.comp.hardware.pc-homebuilt,alt.engineering.electrical,sci.electronics.repair,sci.electronics.basics,alt.home.repair
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On Sun, 12 Mar 2017 02:41:57 -0000, David Lesher wrote:
"James Wilkinson Sword" writes: It was news because Verizontal refused to pay; saying it was the contractor's fault not theirs. Which it was. But the contractor should have to pay, and Verizon has to pay in the interim, just as if you order something online and it's lost in the post, it's the postal company's fault, but you still claim from the seller, and the seller from the postal company. Have you ever won an argument with Verizontal? I'm not in the same country as them. -- How many potheads does it take to change a light bulb? Two. One to hold the bulb against the socket, and the other to smoke up until the room starts spinning. |
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