-The 8hp Master Blaster has a 19amp rating.
, The horsepower ratings on most vacuums or like devises are there to wow the consumer and nothing more. Advertising peak horsepower means absolutely nothing to you and I. I am an Electrician and couldn't have said it better than this. You are dead on about the "WOW" factor. I will add most larger HP motors are at least 220vThe horsepower ratings on most vacuums or like devises are there to wow the consumer and nothing more....in my opinion of course.
Master Blaster - 8hp
1hp = 746 watts
Using this we can easily calculate the amperage requirements of an 8 horsepower electric motor.
Watts / Volts = amps
(746 x 8) / 120 = 50 amps
746 x 8 = 5968 watts
5968 / 120 = 50 amps
If 50amps were the actual electrical requirement then we would need use a #6 copper and a 60amp circuit breaker. I feel it safe to say that no one who currently owns a Master Blaster ran a separate 60amp circuit in order to run their Blaster.....
Reality
Like I said
The amperage requirements defined by the manufacturer is a much better gauge in determining the actual power of an electric motor.
As Bob pointed out, the amperage requirement of the Master Blaster is 19. If we work backwards we can determine the approximate horsepower.
Amps x Volts = watts
19 x 120 = 2280 watts
2280 / 746 = 3hp
Once you remove the Master Blaster from it's box you'll notice the power cord is very large compared to what we're used to seeing on our power tools...
If you intend to use an extension cord I suggest you use a #12 wire suited for 20amps...
-The 8hp Master Blaster has a 19amp rating.
(I'd say this is @initial start-up...both motors.
I figure at least a 25% drop during run time)
A generator should have a similar/higher ampere-rating.
The formula for this is:
A=wattage/voltage
19(A) = (x)watts/120(v)
watts = 2280<<<
-What is the ampere-rating at: 100%/75%...for this particular Honda generator?
IMO...
A generator should be rated ~2850-3000w to accommodate both motors of a MB @ initial start-up.
-Starting/Running just one 4hp would kinda defeat the purpose of this Metro-unit's "8hp capacity".
-You might get away with starting one motor at a time...
But I wouldn't guarantee that this method wouldn't "overload" this Honda generator, or not.
Bob
The horsepower ratings on most vacuums or like devises are there to wow the consumer and nothing more....in my opinion of course.
Master Blaster - 8hp
1hp = 746 watts
Using this we can easily calculate the amperage requirements of an 8 horsepower electric motor.
Watts / Volts = amps
(746 x 8) / 120 = 50 amps
746 x 8 = 5968 watts
5968 / 120 = 50 amps
If 50amps were the actual electrical requirement then we would need use a #6 copper and a 60amp circuit breaker. I feel it safe to say that no one who currently owns a Master Blaster ran a separate 60amp circuit in order to run their Blaster.....
Reality
Like I said
The amperage requirements defined by the manufacturer is a much better gauge in determining the actual power of an electric motor.
As Bob pointed out, the amperage requirement of the Master Blaster is 19. If we work backwards we can determine the approximate horsepower.
Amps x Volts = watts
19 x 120 = 2280 watts
2280 / 746 = 3hp
Once you remove the Master Blaster from it's box you'll notice the power cord is very large compared to what we're used to seeing on our power tools...
If you intend to use an extension cord I suggest you use a #12 wire suited for 20amps...
In order for me to take a stab at answering your above question, Mark,
Bob, I'm your #1 fan! Thank you for the very detailed reply!! : urtheman:In order for me to take a stab at answering your above question, Mark,
I must take the following into consideration:
-If the 8hp Master Blaster's power cord is as listed...Heavy Duty 3 Conductor Cord (12/3; 20 amp.)...
then it is most beneficial to use a similar wire-gauge (12/3; 20 amp.) extension cord, when the need arises.
-Also:
The length of an extension cord is a factor. You'll get more voltage drop in a 50 foot cord than you will in a 10 foot cord.
Voltage drop will affect the performance of a power tool. A power tool may still work with an extension cord, but it's not
going to have the same max/full power potential, as it will with its: "Engineeered to proper-length power cord".
But...Still:
I keep in mind, that the amperage to the outlet I'm going to plug the Master Blaster,
or an extension cord, into, to operate the MB...Is limited by the amperage of the:
Circuit breaker, wall-wire, wall outlet, and, perhaps, any other electrical-devices on that circuit.
These items should be properly-sized for the same 12/3 amperage capacity...20amps.
(BTW: The 8hp. Master Blaster is at least 19amps at initial start-up...)
IMHO, then:
Never "under-size", what the electrical-equipment/tool calls for,
from the electrical panel to the tool's triggering-mechanism!!
To do otherwise will create a: Weakest Link
Bob
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