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An EC worked this up. Does this seem correct? #91579
01/23/05 11:01 PM
01/23/05 11:01 PM
L
Load-n-Code  Offline OP
Member
Joined: Jan 2005
Posts: 20
CA, USA
An EC worked this up. Does this seem correct...

Computed Load;
Noncontinuous Loads
Receptical Load;
42 duplex recepticals @ 180 volt-ampere 7560
7560 volt-amperes @ 100% 7560
Total Noncontinuous Load: 7560
Continuous Loads;
General Lighting Load;
--1482 sq. ft. at 3 volt-amperes per sq. ft 4446
Show Window Lighting Load;
--12ft at 200 volt-amperes per ft. 2400

Outside Sign Circuit 1200 volt-amperes 1200
Total Continuous Load: 8046

Total Non-Continuous Load plus Continuous Load: 15606

Minimum Size Feeder Overcurrent Protection
--Total noncontinuous loads 7560
--Total continuous loads @ 125% (8046*1.25) 10058
Total Load: 17618

17618 volt-amperes / 208 volts = 85 amperes
The next higher standard is 100 amperes

Minimum Size Feeders
-- 15606 volt-amperes / 208 volts = 75 amperes

Feeder size #2 cu THHN or #1 TW

---------------------
What is actually at the space
---------------------
The retail space is 1482 s.f. & has ...
---
42 duplex receptacles
(27 of them located on 9 separate ckts. 3 duplex recepts / ckt. at ea. salon stylist station)
---
2 duplex recepts. ceiling mounted at storefront.
---
2 conv. duplex recepts at front desk in addition to
1 dedicated for the cash register/computer
---
2 conv. duplex recepts. in the retail area
---
3 duplex recepts. for sit down hair dryers
---
5 conv. recepts. in the stock room
---

There is also...
1 - 18kW water heater
1 - 8A Automatic Washer
1 - 12A Automatic Dryer
2 - Exit/Emergency Light
1 - Exit Light
1 - Emergency Light
1 - 2-1/2 ton AC - 208y/120 1phase 23.3A 40OCP
1 - J-Box for exterior sign

Lighting
12 - 4 lamp 2'x4' recessed fluorescent fixtures (can lamp with 32w lamps)
1 - 2 u-lamp 2'x2'
1 - fan restroom
2 - 2 lamp 8' fluorescent strip light
4 - recessed incandescent can type fixtures

-----------------
Please help educate me...

Thanks,
--Mario


[This message has been edited by Load-n-Code (edited 01-25-2005).]

2017 / 2014 NEC & Related Books and Study Guides
Re: An EC worked this up. Does this seem correct? #91580
01/23/05 11:42 PM
01/23/05 11:42 PM
B
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
Why did you not include this load in the calcuations? It the service 120/208 3 phase?

1 - 18kW water heater
1 - 8A Automatic Washer
1 - 12A Automatic Dryer
2 - Exit/Emergency Light
1 - Exit Light
1 - Emergency Light
1 - 2-1/2 ton AC - 208y/120 1phase 21A 40OCP



[This message has been edited by Bob (edited 01-23-2005).]

Re: An EC worked this up. Does this seem correct? #91581
01/24/05 01:36 AM
01/24/05 01:36 AM
L
Load-n-Code  Offline OP
Member
Joined: Jan 2005
Posts: 20
CA, USA
NEC 2002
220.13 Demand Factors for Non-Dwelling Receptacle Loads
Which receptacles are included in the total?
(just the 42 receptacles @ 7560VA, correct?)

That was the question...
These were left out should I calculate these as follows...

NLCL - Non-Continuous Load
LCL - Continuous Load

1 - 18kW water heater
NLCL - 18248VA

1 - 8A Automatic Washer
NLCL - 960VA

1 - 12A Automatic Dryer
NLCL - 1440VA

2 - Exit/Emergency Light
LCL - 225VA

1 - Exit Light
LCL - 63VA

1 - Emergency Light
LCL - 94VA

1 - 2-1/2 ton AC - 208y/120 1phase 23.3A 40OCP
23.3A * 208V = 4646.4VA

Thanks,
--Mario

[This message has been edited by Load-n-Code (edited 01-25-2005).]

Re: An EC worked this up. Does this seem correct? #91582
01/25/05 05:54 PM
01/25/05 05:54 PM
B
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
I would consider the WH, Dryer and AC and continuous loads.

Re: An EC worked this up. Does this seem correct? #91583
01/26/05 05:04 AM
01/26/05 05:04 AM
L
Load-n-Code  Offline OP
Member
Joined: Jan 2005
Posts: 20
CA, USA
Bob,
Thanks

--Mario


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