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This topic comprises 2 pages: 1 2
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Topic: Replace your oven element
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Marcel Birgelen
Film God
Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012
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posted 05-09-2018 04:00 PM
I've had an oven on fire about 4 years ago. The fire started at the "top" heating element used for the "grilling" functionality which was enabled at the time.
Although grease buildup is the most common cause for a fire around such elements, the oven was thoroughly cleaned just a day or two before the fire. The heating element was also cleaned and afterwards I suspect that this could've been the trigger.
Since the oven was built-into the kitchen, the only way to turn it off was by flipping a breaker. I've extinguished the fire with a fire extinguisher. It was an assurance for me that those things actually work as intended.
The oven was a total loss, as was the separate microwave appliance positioned above it. The heat coming out of the burning oven was not only sufficient to melt the entire front of the appliance itself, but also that of the microwave oven.
In the end, the damage was pretty confined, but it could've easily burned the place down if it went on unnoticed for a few minutes. Since then, I'm pretty reluctant to leave something in the oven, without actively supervising it.
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 05-10-2018 06:12 AM
Wow Leo. I'm amazed you can live with AFCI/GFCI on everything. Nuisance trips are a PITA and AFCI are easily fooled, particularly for gas appliances. The igniters make the kind of noise that AFCI is looking for (high frequency noise in the 200KHz region). It is a case where they found something that CAN be an arc but not necessarily and burden society with a protection that probably has a 1000:1 (or more false trips).
GFCI isn't as bad as its trigger is more than 5mA disparity between line and neutral. There more things you have on either on any circuit (including the distance between the device (breaker or outlet) greatly affect nuisance trips.
In our kitchen, EVERY receptacle is its own GFCI and that had dropped nuisance trips to zero. AFIC on a branch circuit is okay if they are on GP outlets where typically one or zero things are plugged in but the more you have plugged in, geometrically, you increase your chance of false trips. And if you do have gas appliances with their igniters, if it is code in your area/year of building to have AFCI, you're probably better off to use a dedicated receptacle for each of those devices than to use a breaker that is likely some distance from the device. The real goal of the AFCI is to prevent in-wall arcs from slowing working their way into a fire. Dedicated/designated circuits are rarely going have that opportunity (washer/dryer 120V receptacle). An oddity of the NEC code, though I believe they updated it in 2017 to cover it, the washer outlet does not need to be GFCI unless it is within 6-feet of a sink. Isn't the washer sort of a sink in and of itself? Even a front loader, the odds that you have wet hands are reasonably high. Our house, recently built and due to when permits were filed and when the locality adopted NEC codes, has a laundry closet for the washer/dryer and that outlet has no GFCI because, for sure, in the 2012 NEC code (the prevailing one on construction permit) does not require it. Laundry areas, like kitchens, have/had separate designations in the code.
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