Greetings all, I have a garbage disposal going in a SFD that has a nameplate that says "1HP 7Amp 115V"
link:
https://www.moen.com/products/EX-Series/EX-Series-1-Horsepower-Lighted-Garbage-Disposal/EXL100C
In adding this to my load calcs I typically follow the guidance of my 2020 NEC 220.18(A)
and head to article 430:
430.6(A)(1) says to use the table [Table 430.248]
to lookup amps based on HP values and not the nameplate amps,
then consider 430.53(A):
Its usually not a big difference, but on a rough in we typically run a 15A circuit for the disposal,
but in this case it would need to be a 20A,
its strange that its more than double the nameplate as 1HP disposal is 16 amps.
If it did not come with its own 'air switch' it would need a 20 Amp HP rated switch per 404.14(A)(4).
I am probably over thinking it as it only runs for a split second.
But often we run the wire for these before they are even selected.
link:
https://www.moen.com/products/EX-Series/EX-Series-1-Horsepower-Lighted-Garbage-Disposal/EXL100C
In adding this to my load calcs I typically follow the guidance of my 2020 NEC 220.18(A)
Code:
Motor-Operated and Combination Loads. Where a
circuit supplies only motor-operated loads, Article 430 shall
apply...and head to article 430:
430.6(A)(1) says to use the table [Table 430.248]
to lookup amps based on HP values and not the nameplate amps,
then consider 430.53(A):
Code:
Not Over 1 Horsepower. Several motors, each not exceed-
ing 1 hp in rating, shall be permitted on a nominal 120-volt
branch circuit protected at not over 20 amperes or a branch circuit
of 1000 volts, nominal, or less, protected at not over 15 amperes,
if all of the following conditions are met:
(1) The full-load rating of each motor does not exceed
6 amperes.Its usually not a big difference, but on a rough in we typically run a 15A circuit for the disposal,
but in this case it would need to be a 20A,
its strange that its more than double the nameplate as 1HP disposal is 16 amps.
If it did not come with its own 'air switch' it would need a 20 Amp HP rated switch per 404.14(A)(4).
I am probably over thinking it as it only runs for a split second.
But often we run the wire for these before they are even selected.
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