Fat Focus
Posts: 41
Joined: Mon Jun 04, 2018 2:58 pm

Breaker size for 2018 Focus Electric

Sun Jun 17, 2018 3:56 pm

Guys,

I bought a 2018 white Electric today. I'm pretty stoked! However, after a few mins of charging it tripped the 20 amp breaker I had my Clipper Creek HCS-40 wired to. I used to have a Fusion Energi which didn't have much current draw. Oh and the sales guy delivered the car since I had my Shelby and he failed to ensure the 120V cord was in the trunk and I failed to check before he left. He's going to deliver it to me tonight.

What is the max draw my new car is going to have so I can size the breaker appropriately. The charger is designed with a max of 32 amps. Google and site search didn't have much and I didn't see anything in the owners manual..

Andy
2018 Focus Electric
2013 GT350 Supercharged Widebody Convertible
1999 F250 7.3 Crew Cab 6-Speed 4x4
1964 Falcon Convertible 289 4-Speed

spirilis
Posts: 154
Joined: Fri Jul 14, 2017 4:53 am
Location: Maryland

Re: Breaker size for 2018 Focus Electric

Mon Jun 18, 2018 2:17 am

It pulls up to 28-30A. A 40A breaker is appropriate (32A max). So your HCS-40 needs a circuit sized appropriately (and 8 gauge wiring) or else you should get an adjustable EVSE to throttle the Focus down to 16A for your 20A circuit (which is the max the Ford Energi vehicles support).
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)

triangles
Posts: 1056
Joined: Tue Aug 16, 2011 11:40 am
Location: Toledo, Ohio

Re: Breaker size for 2018 Focus Electric

Mon Jun 18, 2018 10:41 am

Also in case you aren't aware, to reduce the likelihood of burning your house down, your EVSE max load (32A) can be no greater than 80% of the rated capacity of your wiring and circuit breaker. This means your circuit breaker and wiring needs to be at least capable of 40A. FYI Ampacities of various wire types and Romex type wring falls into NM-B UF-B column. Hope this helps. If you are uncomfortable with household wiring it's probably worth the expense of an electrician to verify everything is correct as opposed to dealing with a house fire if your wiring is wrong.
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)

Fat Focus
Posts: 41
Joined: Mon Jun 04, 2018 2:58 pm

Re: Breaker size for 2018 Focus Electric

Mon Jun 18, 2018 1:08 pm

Thanks! The charger is wired directly into the breaker panel with the leads that came with the charger. Sounds like I should get a 40A breaker then.

The panel was upgraded when the Solar City install was done under the previous homeowner, so it should be fine.
2018 Focus Electric
2013 GT350 Supercharged Widebody Convertible
1999 F250 7.3 Crew Cab 6-Speed 4x4
1964 Falcon Convertible 289 4-Speed

Fat Focus
Posts: 41
Joined: Mon Jun 04, 2018 2:58 pm

Re: Breaker size for 2018 Focus Electric

Mon Jun 18, 2018 1:09 pm

Oh and my friend is a licensed electrician and he does all my wiring stuff.
2018 Focus Electric
2013 GT350 Supercharged Widebody Convertible
1999 F250 7.3 Crew Cab 6-Speed 4x4
1964 Falcon Convertible 289 4-Speed

triangles
Posts: 1056
Joined: Tue Aug 16, 2011 11:40 am
Location: Toledo, Ohio

Re: Breaker size for 2018 Focus Electric

Tue Jun 19, 2018 5:21 am

Yep if that's the case a 40A breaker is what you need.
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)

campfamily
Posts: 439
Joined: Tue Apr 21, 2015 8:07 am
Location: Southern California

Re: Breaker size for 2018 Focus Electric

Tue Jun 19, 2018 5:51 am

Fat Focus wrote:Oh and my friend is a licensed electrician and he does all my wiring stuff.
So, if your friend is a licensed electrician, have to ask why you are getting your wiring questions answered from an Internet forum? You should be telling us what needs to be done!!!
GONE - 2015 FFE, Magnetic with leather interior, debadged & tinted
38,500 miles (since May 2015), average 246 Wh/mile

REPLACED WITH - 2018 Tesla Model3, LR RWD, Obsidian Black
11,000 miles (since Nov 2018), average 235 Wh/mile

Fat Focus
Posts: 41
Joined: Mon Jun 04, 2018 2:58 pm

Re: Breaker size for 2018 Focus Electric

Tue Jun 19, 2018 6:05 am

campfamily wrote:
Fat Focus wrote:Oh and my friend is a licensed electrician and he does all my wiring stuff.
So, if your friend is a licensed electrician, have to ask why you are getting your wiring questions answered from an Internet forum? You should be telling us what needs to be done!!!
He's pretty busy and no longer does electrical work daily.
2018 Focus Electric
2013 GT350 Supercharged Widebody Convertible
1999 F250 7.3 Crew Cab 6-Speed 4x4
1964 Falcon Convertible 289 4-Speed

spirilis
Posts: 154
Joined: Fri Jul 14, 2017 4:53 am
Location: Maryland

Re: Breaker size for 2018 Focus Electric

Tue Jun 19, 2018 6:17 am

As long as the EVSE is wired with 8 gauge wire, it should be OK. Smaller than that I would hesitate and see if the wire can be re-run.
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)

Fat Focus
Posts: 41
Joined: Mon Jun 04, 2018 2:58 pm

Re: Breaker size for 2018 Focus Electric

Tue Jun 19, 2018 7:05 am

spirilis wrote:As long as the EVSE is wired with 8 gauge wire, it should be OK. Smaller than that I would hesitate and see if the wire can be re-run.
I would think they'd use the correct size wire on the charger itself as delivered from the factory. Here's the info I found in the manual. I suppose I could open up the unit and use larger wiring but again, I'd think they'd use what is required out of the box. The run from the breaker to the charger is less than 3 feet.

The three supplied HCS-20, 25, 30 or 40 HCS-40 service conductors use stranded 10 AWG 75ºC copper wire.

The three supplied HCS-50, and HCS-60 service conductors use stranded 8 AWG, 75ºC copper wire.
2018 Focus Electric
2013 GT350 Supercharged Widebody Convertible
1999 F250 7.3 Crew Cab 6-Speed 4x4
1964 Falcon Convertible 289 4-Speed

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