Electrical

Electrical Questions? Ask an Electrician Online.

Ask an Expert,
Get an Answer ASAP!

Electrical

Sinclair talked to you before about a year ago. I am

Customer Question
Hi Mike, Steve Sinclair talked...
Hi Mike, Steve Sinclair talked to you before about a year ago. I am planning on doing a 400a service project and need some questions answered please if you could help me out. i read in an article 310.15 believe that the entire load to a service can be squeezed ( as far as the riser service conductors are concerned ) to 83% is that correct? so my question or series of questions, sorry im a little confused and absolutely in need of your help .. so the project i am in the middle of ordering stock for the home owner through a supply house Standard Electric down here in Lowell, MA is a 3 metered 400 amp service i believe because the property owner mentioned to me since he spoke with National Grid that they only can have a 200 amp service or a 400 amp service? no 300? either way the guy David the property owner wants his existing panels demo'd and a new 400 amp service. the man wants copper conductors. so with 3 metered off locations, 1 powering a 100 amp service seperately metered for 1st floor a second seperately metered off 200 amp panel for the 2nd and 3rd floor and he wants out of the 200 amp main to power each floor seperately with a sub panel so i was thinking a (2) 100 amp overcurrent devices powering subs on both the 2nd and 3rd floor. is that legal to have two 100 amp subs out of a 200 amp main panel? and then lastly a 3rd seperately metered off 100 amp panel to be a common panel but he wants to run a sub panel off of it to his 3 flr garage? is that legal? because i could have sworn he even mentioned it wasnt legal but like wants to do it anyways? confuseinf. so if the 83 percent to the riser service conductors for a 400 amp service powering (2) 100 amp main panels in basement as well as (1) 200 amp main panel, as copper and with 90degree temperature rated sheathing would be 350 kcmill that are good for 350 amps?
Submitted: 1 year ago.Category: Electrical
Show More
Show Less
Ask Your Own Electrical Question
Answered in 1 hour by:
6/6/2016
Electrician: Mike G., Master Electrician replied 1 year ago
Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7,765
Experience: Proven Professional 48 years Experience
Verified

Hey Steve. Code requires a demand factor for the 4 units at 100A have a 45% factor which makes a 200A service. See Art 220.84

Ask Your Own Electrical Question
Customer reply replied 1 year ago
you are saying that i do not need to size the service to 400 amps but only to 200 amps if i am metering off 3 locations 1. being a 100 amp main panel basement to power 1st floor 2. a 200 amp main panel with 2 100 amp sub panels ran off of it and 3 being a 100 amp common panel/garage 100amp sub panel?
Customer reply replied 1 year ago
if you'd prefer me to call thats fine. thank you
Electrician: Mike G., Master Electrician replied 1 year ago

I can call tomorrow if that works for you.

Ask Your Own Electrical Question
Customer reply replied 1 year ago
i will be working all day tommorow on a basement remodel. i just wiped out my bank account asking a couple more individual questions i dont think i now can pay to call you it wouldnt take my credit card anymore. anyways, thanks for the help Mike appreciate it. my number is *****
Electrician: Mike G., Master Electrician replied 1 year ago

To avoid the phone charges we can continue via the site.. Do you have a code book?

Ask Your Own Electrical Question
Customer reply replied 1 year ago
nec 2014
Electrician: Mike G., Master Electrician replied 1 year ago

Art 220.84 Table is all that is needed for calculating the demand factor of the service size.

Ask Your Own Electrical Question
Ask Mike G. Your Own Question
Mike G.
Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7,765
7,765 Satisfied Customers
Experience: Proven Professional 48 years Experience

Mike G. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Mike

Mike

Master Electrician

1,425 satisfied customers

Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer

Jason

Jason

Service Technician

3,940 satisfied customers

Over 20 years of experience in all types of installations, troubleshooting, and repairs.

Mike G.

Mike G.

Master Electrician

7,765 satisfied customers

Proven Professional 48 years Experience

Kevin

Kevin

Licensed Electrical Contractor

3,715 satisfied customers

30 years Licensed Electrical Contractor in Illinois, Adjunct College Electrical Instructor, Former Electrical Inspector, Diploma: Digital Electronics, FCC Technician License

AssuredElectrical

AssuredElectrical

Master Electrician

3,264 satisfied customers

Contractor-42+ Years in the ElectricalTrade

electrifier

electrifier

Master Electrician

1,458 satisfied customers

Electrical contractor and electrical inspector for over 24 years with phone and networking expertise

Rich

Rich

Master Electrician

1,115 satisfied customers

Over 35 years residential, commercial, industrial wiring, install, troubleshoot, service, maintain

< Previous | Next >

Related Electrical Questions
I have an electric heater 220v, black wire to black to
Hello, I have an electric heater 220v, black wire to black green to copper, Now white to white, there is also a white w red stripe on the heater. I connected that to the white also. Heater works, both… read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
All of the outlets in our garage show hot neutral reverse. I
All of the outlets in our garage show hot neutral reverse. I traced back to the power line that feeds power to the garage. The neutral wire test hot and the black wire test neutral.… read more
David Bowden
David Bowden
Owner
330 satisfied customers
I have had a power loss to everything this 15 amp circuit
I have had a power loss to everything this 15 amp circuit breaker is lined up to. A few outlets and a couple lights. Curcuit breaker never tripped. Swapped out with another 15 and still nothing. What … read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
3,715 satisfied customers
Backstory: I am closing on the purchase of a house, however,
Backstory: I am closing on the purchase of a house, however, the home is feeding power to an adjacent property. I want this shut off, but also removed completely from end to end. I am concerned the ne… read more
Mike G.
Mike G.
Master Electrician
7,765 satisfied customers
Installing an Cadet Soft Heat 220 V baseboard heater in a
Installing an Cadet Soft Heat 220 V baseboard heater in a four season porch. I've been told code is to use a GFCI breaker. So I installed a 220 GFCI breaker in the box (still turned off), but the base… read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I have a ej500 switch and there are 3 wires, red, blue, and
Hi.... I have a ej500 switch and there are 3 wires, red, blue, and black... … read more
Mike G.
Mike G.
Master Electrician
7,765 satisfied customers
I have 2 3wire with ground running into a light box. my
I have 2 3wire with ground running into a light box. my neighbor removed the light but dosent remember how they go back together. the light is on 2 3way switches, but ive never seen the travelers come… read more
George Smith
George Smith
Vocational, Technical or Trade School
273 satisfied customers
This adapter on the AC cord came with the Lenovo laptop.
Hi. This adapter on the AC cord came with the Lenovo laptop. Does anyone know if it's also a surge protector or should we buy a separate surge protector power strip? Thank you very much.… read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I have a Hampton bay ceiling fan. the remote can only
i have a Hampton bay ceiling fan. the remote can only control the fan speeds, but, the light does not work. Tried changing the bulbs bought at Home Depot. Still does not work. On my 2nd run to Home De… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
3,715 satisfied customers
MAZON Harbor Breeze 3 blade ceiling fan, w/remote, 44", Need
MAZON Harbor Breeze 3 blade ceiling fan , w/remote, 44", Need replacement BULB … read more
David Bowden
David Bowden
Owner
330 satisfied customers
I have a 22.5 cu in plastic box and want to put 2 14-3 and 2
I have a 22.5 cu in plastic box and want to put 2 14-3 and 2 14-2 wires plus a 3 way switch in, is this ok … read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I am planning to install an electrical subpanel. Laundry
I am planning to install an electrical subpanel. Laundry facilities are being moved out of a double wide mobile home and into a newly built small structure adjacent to the double wide mobile home. The… read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I have a 1.5 hp motor 3 phase 480 and im trying to wire a
hi i have a 1.5 hp motor 3 phase 480 and im trying to wire a drum switch to it and needed some guidance … read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I would like to run a 30 amp extension from the dryer outlet
I would like to run a 30 amp extension from the dryer outlet to run a 30 amp heater in the garage. The dryer is 4 wire with ground and the heater is 3 wire with ground. Both are 30 amps.I understand t… read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
I have one room where outlets (3) do not have power. Another
I have one room where outlets (3) do not have power. Another room on the same circuit is OK. Replaced one outlet but does not solve the problem. … read more
Sam I
Sam I
Electrician
B.S.
368 satisfied customers
A space heater killed my outlets how much will it cost to
A space heater killed my outlets how much will it cost to fix them … read more
Mike G.
Mike G.
Master Electrician
7,765 satisfied customers
This is so weird... I turned on the light/fan in my bedroom,
This is so weird... I turned on the light/fan in my bedroom, the lightswitch sparked and the lights on the fan went out, but the fan still worked. My husband replaced the switch and the lights worked … read more
Mike G.
Mike G.
Master Electrician
7,765 satisfied customers
I have three wires in ceiling, ,black and red. what is the
I have three wires in ceiling, white ,black and red. what is the wiring diagram for the remote in this case? … read more
Mike G.
Mike G.
Master Electrician
7,765 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x