Cooking Equipment

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Flight987

Senior Member
Does anyone out there know of a free download for a more detailed way of understaning 220.55 and it's notes.
Mike work book does as much as he can, but I need more. I have school made test for a AJ test. I need HELP
on these. Like Mike said on DVD , you could make a test, just on 220.55.
 

Flight987

Senior Member
Cooking Equipment

What is the maximum feeder demand for 4-16.4kw household ranges installed in a multi-family dwelling?
Answer Key 20.4 kw.
I will try and see what happen's for my Answ.
Go for it out there and let's compare.
I will turn Mikes DVD now and go from there!
 
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Flight987

Senior Member
Cooking Equipment

I don't know how you did it. Mikes DVD has not got that far. Show me your Breakdown, that is why i asked for help!
 

Flight987

Senior Member
Range Cal.

Range Cal.

The Ques. Apartment building has 44, 13.2 kw ranges. Feeder demand is what. Key answer 60.9 kw.
I have the Multiplier 1.05 This doesn't look that tough. 25kw+(44x.75=33kw) 33=58kw. Where do I
use the Mult.?
 

Flight987

Senior Member
Range Cal.

Range Cal.

Took the 1.05x 25 kw (number of ranges 41-50)=26.25 + (44x.75=33) 33 =59.3 kw. Mike said on DVD,
you won't always come out to perfect #. So am I right?
 

Flight987

Senior Member
Range Cal.

Range Cal.

Ques. 13.6 kw range in 36 apartment's, supply 120/208, divide on 3 phases, Answ. key 64.35.
Thought I punch this out in 4 Min. 36=(31-40)=15kw+(1kw per!) 36=51kw. 51kw x1.10=56.1
What's up with this one?
 

jumper

Senior Member
Ques. 13.6 kw range in 36 apartment's, supply 120/208, divide on 3 phases, Answ. key 64.35.
Thought I punch this out in 4 Min. 36=(31-40)=15kw+(1kw per!) 36=51kw. 51kw x1.10=56.1
What's up with this one?

Read this from 220.55:

Where two or more single-phase ranges are supplied by
a 3-phase, 4-wire feeder or service, the total load shall be
calculated on the basis of twice the maximum number connected
between any two phases.
FPN No. 1: See Example D5(A) in Annex D.

Your total number of ranges is not 36 when using Col C, it is 24. Why?
This a harder one. I blew one this not log ago.

Take another stab and we will continue. You should be able to get as far 42.9. This not the final answer.
 
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