ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
fuse rejectors
by HotLine1. 03/20/17 08:14 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,152 Are you busy
165,898 Re: Forum
160,446 Need opinion
Who's Online Now
0 registered members (), 51 guests, and 13 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#17968 - 12/04/02 07:44 PM Load for feeder  
sparkync  Offline
Member
Joined: Oct 2002
Posts: 812
NC
On the Refrigerated building I spoke of recently, I wonder if someone can check my math on the load. I have:

2- 3 phase scroll type compressors with
a RLA of 12.2 amps ( 12.2 X 2)= 24.4
25% of largest motor = 3.5

2 unit coolers inside:
The fans in each unit pulls:3 amps
( 3 X 2 )= 6.0

The defrost cycle for each pulls:
11.7 amps( 2 X 11.7 ) = 23.4

VPL ( I'm not sure what this is) = .8
Anti-sweat heater = 1.47
5 - 100 watt. lights = 4.17

Total load = 63.74

Anybody see that I'm missing something??
I'm presuming the fans run all the time
inside, according to what the rep. said,
even when they are in defrost cycle??
I thought they stopped during defrost,
myself, maybe I misunderstood him. Hope this comes out like I got it typed and not jumbled up...Thanks for the input.. Steve [Linked Image]


Work Gear for Electricians and the Trades

#17969 - 12/05/02 02:33 PM Re: Load for feeder  
mj  Offline
Member
Joined: Jun 2002
Posts: 186
meriidian, ms
check your 3. phase math calculations, i thank you total load will be about 15 amps less



Member Spotlight
RonKipperDatacom
RonKipperDatacom
Kansas City, KS
Posts: 30
Joined: January 2013
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 14 (0.003s) Memory: 0.7414 MB (Peak: 0.8560 MB) Zlib enabled. Server Time: 2017-03-23 02:09:35 UTC