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1. ### CEC Demand factors/ feeder size: small cabins

Hey y'all, I'm trying to determine the feeder sizes for a couple of tiny cabins that a client is putting on their property. They are incredibly small- like 100sq', but they plan to rent them out. (Not a tiny house on wheels) I'm not sure how to classify them: dwelling unit? apartment? They...
2. ### CEC Any contractors charge for resi load calculations?

I have come across a few residential reno estimates where there was debate about whether the existing service would be able to handle certain items on the customer's wish list. While I have to follow suit with my competitors about providing free estimates, I am becoming reluctant on also...
3. ### Load Calculation on Coffee Shop

Commercial Electrical Forum
Hello, I am new here and only been working on a few commercial projects. I'm working on a small project upgrading an electrical panel from an old (outdated)100AMP panel to 200AMP. The Disconnect switch from the outside meter is currently 100AMP and it has aluminum wire instead of copper from...
4. ### Air Conditioning Load Calculation

NEC Code Forum
I'm performing a residential load calculation, as required by the city, for a swimming pool equipment install. I'm having a little trouble with the air conditioner. The equipment tag on the compressor unit mounted on the slab outside says: Compressor RLA: 14.9 LRA: 96 Minimum CKT...
5. ### 3 Phase Generator Output

General Electrical Discussion
Could someone please confirm my understanding of 3 phase generators power output. I'm in Australia so all calculations are in 240v A 30kVA generator in total can provide a theoretical maximum of 30,000/240 = 125A which would be 41.6A per phase? Using a power factor or 0.8 we get a total of...
6. ### Calculations Heating Ductless Units

General Electrical Discussion
I have a customer who has two ductless heating/cooling units (for two lower floor rooms), floor heat (for 3 baths and one lower floor bedroom), 3 bathroom ceiling heaters rated at approx. 12 amps each, and a gas furnace. I calculated the ductless units, anticipated floor heat, and ceiling...
7. ### Two family load calc help

Services and Service Equipment
hello guys I'm new to the forum and need some help. I'm doing an addition onto one unit within a two family dwelling, it is roughly 1,900 sq ft I completed a load calc no problem using the standard method, the total load is 142.5 amps for both units, 102.5 amps for the first floor unit including...
8. ### On the load (again?)

General Electrical Discussion
My problem is a 24 unit co-op building that was renovated in the late 1970s. It has three phase, 4 wire, electrical service conductors that feed a 400 Ampere 3 pole fused switch which supplies the apartments and the public areas. I am trying to work backwards from the 400 amp electrical switch...
9. ### Are Utility Companies required to follow Solar PV connection NEC

NEC Code Forum
I have an interesting situation. I have a 12k solar PV array for a residential service. There are two interters that is expected to output 22 amps and 30 amps repsectively. They are also to have breaker in the Load Box at 30 amps and 50 amps respectively. According the my HQs read on NEC it...
10. ### Load Calculations and Service Set Up

General Electrical Discussion
I have a customer who has a double wide trailer and two other outbuildings on the same piece of property. The trailer is powered from the meter pack which has space for other breakers. Right now it has two other 125A double pole breakers which serve the other two buildings. Is there anything...
11. ### article 220, Part III..Air Cond. load

NEC Code Forum
In NEC Article 220, Part III (Feeder and Service Load Calculations) what provision is there for an air conditioner load ? W-H-E-R-E in Part III does air conditioner load fit into the scheme of things? Ranges, clothes dryers, etc, are addressed. But what about an air conditioner load ...
1-11 of 11 Results