Breakers protect wiring and trip on shorts I'm no electrician, but this is my understand of how the various codes work together to protect all components of the circuit. Breakers actually have a "Load characteristic curve" that you can tell when it will trip in time vs current. If the trip was due to a direct short, the breaker will trip Immediately. If the overload were bigger, say 60A the breaker would trip faster from 10-35 seconds.
Everything works fine until 20-100 seconds later the breaker trips! Joe overloaded his 20A circuit, by drawing 40A! The breaker will allow this overload for a short time. The breaker and receptacle are rated as "Time overcurrent" meaning it can take a lot of current for extremely short durations, and will trip on lesser currents that occur for a longer time.Īn example one can relate to (refer to chart): Joe plugs in two electric heaters in his family room. A short circuit in actuality can be hundreds of amps in a very short duration. The receptacle is overrated, otherwise it would blow up upon a short. A 15A receptacle can take 20A for a short time with no problem. If it were to short, it will trip the 20A breaker just as it would a 15A breaker. If the appliance were using 15A, it will be safe with the 20A breaker ( 80% = 16A). It should be noted that any circuit that is intended to be 20A must use a 20A recepticle. If more than a total of 20A were to be drawn from the circuit, the breaker will trip. The reasoning is so that today's demanding appliances, which draw more current, can be used with a 20A breaker without the worry of nuisance tripping. The total circuit draw (multiple appliances - same circuit) can be 20A before the breaker trips.Ī 20A breaker used with 12awg wire can feed multiple 15A outlets, one example is the kitchen. Any single appliance with a 15A plug will not normally draw more than 80% of 15A, or 12A. That is to say that the 20A circuit is in continuance throughout the circuit, however the receptacle itself (the contacts) are rated for 15A continuosly. If all the above is true, why would a 15A receptacle even have to be rated to 20A?Ī 15A outlet is rated for 15A, with a 20A pass through. So, there is AFAIK no situation in which a 15A receptacle would ever have to handle more than 15A, even if installed on a 12AWG, 20A-breaker circuit. In addition, outlets are always wired in parallel, meaning that a 15A outlet would never have to transmit the amperage draw of a "downstream" outlet you never "daisy-chain" outlets by connecting hot to neutral, for a number of reasons.
An appliance that draws more than 15 amps would have a "T-blade" plug that wouldn't go into a standard 15A outlet. However, by design, there is nothing that will plug into a 15A outlet that will draw more than 15A. This question had a comment that 15A outlets were actually rated to 20A.
#15 amp fuse for free
Problem for techs doing it because we need to keep a good working relationship with the manufacturers & down here JD take a dim view of people who buy a manual the distribute it widely for free or profit.OK, the one answer I got was way off target, and another commenter couldn't figure out what I was asking, so I'm restating the question.Īre 15A 3-prong grounded outlets actually rated to 20A, allowing them to be used on 20A circuits? And if so, why, when the outlet can never be asked to supply more than 15A by anything that would be plugged into it?
#15 amp fuse manuals
Some on the list are very good about sharing manuals ( or part there of ) and some will have old ones they don't need. If you don't have the manual ( and your should ) start a new thread asking is some one has one they can send you.
#15 amp fuse serial number
We really need the serial number after which I can find the right diagram & post it. The down side of this is there are about 20 variations to the wiring diagrams so it is not going to be a simple case of "resolder the blue wire " job. The 445's ran for a very long time and are very good tractors, as you know cause you have one.
The second time I found a geek to fix it.Īnd yes the second time the owner who "just had to mow the grass" shoved a 40A fuse in there which apparently blew every hour or so and melted the fuse holder in the process. I know that because I had to replace one, twice.įirst one got replaced with a new one as it had corrosion all over the place & had been shorting at the relay bases due to build up of conductive dust.
The board that the fuse sits in is around $ 1000 (AUD) and the fuse is there to protect it.
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