About Us

Keyser Soze

On 10/12/18 2:12 PM, wrote:
On Fri, 12 Oct 2018 11:02:06 -0400, Wayne.B
wrote:

On Fri, 12 Oct 2018 08:23:18 -0400, Keyser Soze
wrote:

I happen to have that info handy because I looked it up last week when I
had to replace a dead microwave oven. Here's how it is figured:

A 1200 watt output microwave takes 10. The typical formula for this is..
P = VI.. I = P/V = 1200 /120 =10 A. Hence, one would think that the
answer is 10 A.. However, this formula applies only for DC current. For
AC current,. P=VI cos (theta). where theta is the phase difference
between V and I.. This phase difference is created by the inductances
inside the microwave oven.

===

Whoo hoo! 'Airree discovered Power Factor, well known to EEs of
course, which is why most high powered AC electrical devices are
rated in KVA instead of KW. For bonus points explain why inductors
create a phase difference between voltage and current.

I was going to say something about that but I am just a high school
graduate so Harry would think it was bull****.
I imagine he thinks the left/right hand rules are just about whether
he is fantasizing about Selma Hayak or Scarlett Johannson.
Even we dumb assed electricians know about power factor. The only time
it usually causes a problem is in 3 phase wye neutrals (triplin
harmonics)

This is something I would find worth knowing because...

Damn, I can't think of one reason...

When I need home wiring advice, or heavy appliance advice, or serious
plumbing advice, or repairs or new service in those areas, et cetera, I
call a licensed tradesman or contractor.

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
US - Betsy Gals II 2018005-09	Bob_R[_3_]	Tall Ship Photos	2	May 14th 18 04:34 AM
Betsy	MWB[_2_]	Tall Ship Photos	0	June 29th 11 02:12 PM
Hoods for LCD Displays	Vic Fraenckel	Cruising	5	May 16th 05 08:57 PM
Hoods for LCD Displays	Vic Fraenckel	Electronics	4	May 16th 05 08:57 PM
Hoods for LCD Displays	Vic Fraenckel	Cruising	0	May 15th 05 11:19 PM

Menu

About Us