different hp ratings on routers

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by oledo posted 02-29-2012 02:30 AM 697 views 0 times favorited 1 reply Add to Favorites Watch
View oledo's profile


16 posts in 1699 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?

-- Go Big Blue

1 reply so far

View Dallas's profile


3599 posts in 1907 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.

-- Improvise.... Adapt...... Overcome!

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics