different hp ratings on routers

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Forum topic by oledo posted 02-29-2012 02:30 AM 821 views 0 times favorited 1 reply Add to Favorites Watch
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16 posts in 2485 days

02-29-2012 02:30 AM

What is the difference between 2 routers both rated as 15 amp but, one is rated 3.25 hp and the other is rated 2.3hp?

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3599 posts in 2693 days

#1 posted 02-29-2012 03:01 AM

creative advertising.

Think of it this way: What they are telling you really isn’t a lie, it’s the number of amps the motor draws at the point that it locks up and trips the breaker.

In a perfect world, 1 HP = 746 watts. But in the real world, with inefficiencies, 1 HP can equal more than 1200 watts due to voltage drop in the lines, friction in bearings, temperature, etc.

Using the formula V x A = P (expressed as watts), a 15 amp circuit can supply 120V x 15 = 1800 watts. In a prefect world scenario that is 2.41 HP (1800W / 746W = 2.41 HP).
In the real world, the same 1800 watts gets you 1.5 HP (1800W / 1200W = 1.5 HP).

a 20 amp circuit would get you 2400W / 746W = 3.21 HP or real world 2400W / 1200W = 2 HP.

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