On 9/28/2015 5:34 AM, email@example.com wrote:
This is the problem ^^^^^^^^^^^^^^^^^^^^^ In most areas, there is no
way to appeal an inspector's ruling. So, if inspector misinterprets the
Code (or, is "having a bad day"), you're stuck with his ruling.
That is not really true but if the boss (AHJ) agrees you are stuck.
In Florida the AHJ is the state, not the local BO. There are no "local
Just be sure you are right before you go through that process.
At the end of the day, it may come down to what plan review said about
your plans. Not "built to plan" is a slam dunk for the inspector..
OTOH in residential there is no 180va rule on receptacles and you
would win that fight if some inspector tried to enforce it..I have
never seen one try. It is a basic concept in residential load
calculations that you do it by square footage, not receptacle count.
The receptacle placement requirements pretty much assure you will have
plenty you never use.
On Sun, 27 Sep 2015 21:42:02 -0700 (PDT), Uncle Monster
That is the idiot clause. (240.4(D)) that says unless otherwise
permitted in the code 14 ga wire shall be protected by a 15a breaker.
(12 , 100)
It forces the 80% rule on "small conductors"
I could tell you where it is otherwise permitted but your head might
explode (like a legal 40a breaker on 14ga wire)
When you start talking about "fixture wire" (your 18 ga example)
that has to be part of a "listed" assembly, typically U/L listing.
Typically 18 ga wire has a design ampacity of 7a but in a listed
assembly where the load is controlled it can be protected by a 20a
You are dealing with 2 issues, "overload" and "short circuit"
An overload is simply having too much load on the wire. Short circuit
protection is a bolted fault where there is essentially no limit to
the current but the resistance of the wire and the breaker, An 18 ga
wire, less than 50 feet long will operate a 20 a breaker in a bolted
At least that is the thinking.
You can still get in plenty of trouble with extension cords but we
were talking about lamps.
HOW MUCH OF AC YOU HAVE TO COMPENSATE THE HEAT ???
wrote in message
Hi. I'm laying out my basement lighting. I expect to have 25 recessed
lights, each is 75watt max rating (even though I will use LED, I know I must
still assume max rating of fixture). 25x7575watts/120V = 15.6amps.
So, I cannot use one 15amp breaker and 14awg wire.
Can I wire all the lights with 12awg and a 20amp breaker?
All comments appreciated.
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