How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Sir Sparks Your Own Question
Sir Sparks
Sir Sparks, President/Owner/ Master Electrician
Category: Electrical
Satisfied Customers: 2532
Experience:  US State Certified & UK Electrical Contractor for all electrical fields/disciplines
22778599
Type Your Electrical Question Here...
Sir Sparks is online now
A new question is answered every 9 seconds

according to the nec, all 220v appliance require a 4 wire hook-up

Customer Question

according to the nec, all 220v appliance require a 4 wire hook-up Is this information correct? and what section of the nec can that be found.
Submitted: 6 years ago.
Category: Electrical
Expert:  Rich replied 6 years ago.

Rich :

Hello ... 250.113 specifies the use of an equipment grounding conductor

JACUSTOMER-qupt7s98- :

hi, so is three wire ok ?

Rich :

Is this new or existing ?/ are the walls open and the wiring accessable ?

JACUSTOMER-qupt7s98- :

existing open walls.

JACUSTOMER-qupt7s98- :

did you get my follow up question? about the powerwasher?

Rich :

If it is popssible top rewire the appliance to 4 wire feed then you shouild do that

Rich :

That is the existing code

JACUSTOMER-qupt7s98- :

ok... 4 wire becuase it is near water?

JACUSTOMER-qupt7s98- :

the boss and i got into a bit of an arugument about it today. i feel like 4 wire would be safer. 2 hot, one netural one ground. but i cant prove my theory.

JACUSTOMER-qupt7s98- :

and one other question there needs to be a disconnect if more than 50 feet of panel?

Rich :

oopsy ,, that is 250.114

JACUSTOMER-qupt7s98- :

can i look that up myself?

Rich :

The equipment grounding was always there ... it is the neutral that is now required to be separate ..

JACUSTOMER-qupt7s98- :

ok... how about in a wet area. like a car wash?

JACUSTOMER-qupt7s98- :

and when was the revision

Rich :

a car wash building would have many more requirements

Rich :

what is your situation ... ?? are you the owner or the contractor?

Rich :

the revision was when the community or state adopted the 2008 NEC

Rich :

are the cars driven thru the car wash ... or dragged thru by a belt ?

Customer: replied 6 years ago.
it's not a car wash. its a pressrewasher. 6hp. inside a building. we make industrial soap products. i turned the breaker to the off postion, to move the pressure washer. then i checked for voltage with a meter. and removed the wires. to move the equipemnt. that is when i noticed only 3 wires. instead of the four.
Expert:  Sir Sparks replied 6 years ago.
Hi. Your pressure washer quite likely does not require a neutral so in this case 3 wire is correct; 2 hots and a ground.
Expert:  Sir Sparks replied 6 years ago.
Rich is correct with what he said by the way but a pressure washer is Equipment not an Appliance.

There needs to be a local means of diconnect (a plug and receptacle is sufficient) within 50 ft and in line of sight of the this Equipment.