How does 120v 4.5a = 3500w?

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LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
1750W=14.58A @ 120V. Easy to see how a typo made that 4.5.
Possible.

Then one got cut off. Even the 208/240V version has two power cords. Look again! Was this a display model? They usually cut power cords off of those.
No need.

Turns out it does have two cords. One was opened, the other still bound in plastic.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
Question that just occurred to me- this fryer is brand new out of the box? Not used?
Brand new.

This work, which I did today, was for a kitchen fire-suppression system, and a conversion from gas to electric appliances.

One circuit was this double deep fryer, which meant I had to convert an existing 120v circuit supplying a double-duplex receptacle into a MWBC, with a 2p contactor and replacing the 1p breaker with a 2p.

The other circuit was all-new, a 240v griddle (heavy!!!) which also needed a 2p contactor and 2p breaker.
 

Fulthrotl

~Autocorrect is My Worst Enema.~
I am working in a small commercial kitchen, and came across these specs:

Adcraft DF-6L/2 counter-top electric double deep fryer, 120 V/60 Hz/1 ph, 4.5 A, 3500 W, NEMA 5-15 plug

And repeated: 120v/60/1-ph, 4.5 amps, 1750 watts (per tank), NEMA 5-15P

I've seen the power cord. It is a 120v 15a plug, and the cord is not very heavy.

I don't get it. :? The current should be 29.167a.

https://d3ld6frh4bdurh.cloudfront.net/pdf/122-DF6L2.pdf

if you use lard instead of canola oil, the power factor goes to hell.
 

hbiss

EC, Westchester, New York NEC: 2014
Location
Hawthorne, New York NEC: 2014
Occupation
EC
https://d3ld6frh4bdurh.cloudfront.net/pdf/122-DF6L2.pdf

Near the bottom:

"Each unit requires a 15 amp circuit"
Cada unidad debe ser concentada a
un circuito spearado de 15 am


Well, if we have anything to do with it, at 14.58A each tank requires a dedicated 20A circuit. For a 15A circuit 14.58 is well over 80%. Further, each cord should have a 5-20 plug.

I've long wondered how they get away with 5-15 plugs, and every manufacturer that makes equipment that scrapes by at slightly less than 15A puts a 15A plug on their equipment. I theorize that it's to make it less of a problem to use in existing kitchens that have 20A circuits with 15A receptacles. It will work- until you plug something else into the circuit. Then again that two tank fryer must be a real joy for some people when they plug both line cords into a duplex receptacle. :jawdrop:

I wonder how they get UL approval. I have found some equipment that says to use a dedicated 20A circuit for their 15A plug.

If you have a 5-20 plug it requires a 5-20 receptacle. It needs to be single and on a dedicated circuit because two of anything with a 5-20 plug is going to be more than 20A.


-Hal
 
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norcal

Senior Member
I looked at the unit itself Monday, and the customer confirmed it last might. This is a double unit, and it has only one power cord.

Even then, the math doesn't work out. 1750w @ 4.5a @ 120v.

Perhaps this gem from another forum (OWWM, Old Wood Working Machines) applies.

OWWM Rule No. 1: The seller, standing in front of the machine with access to all sides and in full daylight, will not/cannot describe the machine correctly.

It's a bit late but...
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
It's already done, each has its own 20a circuit. The receptacles were on one circuit, so I added one conductor and swapped the 1p breaker for a 2p, and added a 2p contactor for the fire-suppression shut-off.
 

hbiss

EC, Westchester, New York NEC: 2014
Location
Hawthorne, New York NEC: 2014
Occupation
EC
14.58A is less than 15A. A dedicated 15A circuit would be fine.

I disagree.

TABLE 210.21(B)(2) Maximum Cord-and-Plug-Connected Load to Receptacle

Circuit Rating (Amperes) 15 or 20
Receptacle rating (Amperes) 15
Maximum Load (Amperes) 12

Circuit Rating (Amperes) 20
Receptacle rating (Amperes) 20
Maximum Load (Amperes) 16

Circuit Rating (Amperes) 30
Receptacle rating (Amperes) 30
Maximum Load (Amperes) 24


-Hal
 
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