14-50 vs Charge Station Pro - charge rate difference?

[Aspesi4]

For those planning to wire Charge station pro are you...

a) having the electrician come in and do prep work so that when the charger comes in there is minimal work to finish it up with a 2nd trip?

or

b) are you just waiting until you get the Charge Station Pro comes in and then having him do it all in 1 trip?

I'm debating about what to do now. I'm considering installing a 100A sub panel in my garage with a NEMA 14-50 receptacle. Then when the charge station pro shows up, I can either have it installed right away or use the 14-50 for a while. I need the panel in my garage anyway so that I can add some receptacles to my garage where my workshop is being located due to my Lightning not fitting in that space.

Sponsored

 

[Amps]

Is it permissible to run aluminum service cable through the attic in a gutter? Attic accessible only by ladder. Total run max 125 feet. Any cable size recommendations to run from service panel to 100A EVSE disconnect? I'll be using a licensed professional electrician. I'm trying to find a way to avoid trenching or conduit run on the outside of the home.

Thanks.

 

[luebri]

I'm debating about what to do now. I'm considering installing a 100A sub panel in my garage with a NEMA 14-50 receptacle. Then when the charge station pro shows up, I can either have it installed right away or use the 14-50 for a while. I need the panel in my garage anyway so that I can add some receptacles to my garage where my workshop is being located due to my Lightning not fitting in that space.

Can you install a 100A breaker (for the CSP) in a 100A sub panel? Wouldn't the sub panel need a little head room so a 125A?

 

[Pioneer74]

The NEC uses the terms "ungrounded conductor" for hot, "grounded conductor" for neutral, and "equipment groundING conductor" for ground. I was using the NEC notation, although a lot of people confuse "grounded conductor" with ground, which they aren't.

It is true that the "equipment grounding conductor" (a/k/a "ground") is a "non-current-carrying conductor" for the purposes of the ampacity rules / conduit rules. It is also true (as you note) that the "grounded conductor" (a/k/a "neutral") is a "current-carrying conductor" for those purposes, except under certain conditions (for example, a multi-wire branch circuit uses 2 "hots" and a neutral, but the neutral only carries the difference of current in the two "hots", so you don't have to count the neutral in a MWBC as a current-carrying conductor).

In the NEC, bonding is simply defined as "connected to establish electrical continuity and conductivity" and is usually referenced in connection with equipment grounding, so there is always a fault current path to ground (to allow for OCPD's to work and to reduce shock effects). It also refers to the singular point at which neutral and earth ground (via the equipment grounding electrode) are interconnected.

You are correct. They changed the wording the the code a couple of cycles ago. My brain is stuck on stupid.

 

[teaguem32]

I'm debating about what to do now. I'm considering installing a 100A sub panel in my garage with a NEMA 14-50 receptacle. Then when the charge station pro shows up, I can either have it installed right away or use the 14-50 for a while. I need the panel in my garage anyway so that I can add some receptacles to my garage where my workshop is being located due to my Lightning not fitting in that space.

This is exactly what I am going to do. Main panel from a 100a breaker to a subpanel, then run to a 14-50 plug, then whenever the pro charger comes in convert it. I need a few more 120's in my garage also.

 

[Aspesi4]

Can you install a 100A breaker (for the CSP) in a 100A sub panel? Wouldn't the sub panel need a little head room so a 125A?

Fair point. Ideally I'd have a smaller 10 circuit pane tied to the NEMA 14-50 and the CSP. Gives me some flexibility. I could also derate the CSP to 60A since there's not much difference between the 80A and 60A charge times. Both get it done over night.

 

[Firestop]

For those planning to wire Charge station pro are you...

a) having the electrician come in and do prep work so that when the charger comes in there is minimal work to finish it up with a 2nd trip?

or

b) are you just waiting until you get the Charge Station Pro comes in and then having him do it all in 1 trip?

I’m on the “b” option…my electrician highly recommended this, and I avoid a separate visit charge to wire/mount the FCSP…….he wired my new house 14 yrs ago…I trust his work/advise…..

 

[Pioneer74]

Can you install a 100A breaker (for the CSP) in a 100A sub panel? Wouldn't the sub panel need a little head room so a 125A?

Sub panels, I believe, fall under the same derating calculations as continuous loads. I think you have to take the total load on the panel and multiply that by 1.25.

Can you install a 100 amp breaker in a 100a panel? Yes. But only if your total load doesn't go over 80 amps. The would mean your whole 100a sub panel could only supply the charger set to the full 80 amps.

 

[FlasherZ]

Sub panels, I believe, fall under the same derating calculations as continuous loads. I think you have to take the total load on the panel and multiply that by 1.25.

Can you install a 100 amp breaker in a 100a panel? Yes. But only if your total load doesn't go over 80 amps. The would mean your whole 100a sub panel could only supply the charger set to the full 80 amps.

No, you don't need to double-up on it. 80A charging = 100A conductor and breaker = 100A capacity on the feeder to the subpanel.

 

[Pioneer74]

No, you don't need to double-up on it. 80A charging = 100A conductor and breaker = 100A capacity on the feeder to the subpanel.

So, your saying you can add more load to the subpanel after installing the charger to it?

 

[jefro]

Took me a minute to figure out the gutter deal. I'd think it would cost almost as much to run an open wire mesh conduit raceway as it would to run pvc or metal emt. Commercial uses that a lot above workroom floors.

Just to mention this. Pretty much everyone who buys an EV seems to try to charge at the highest charge possible. You may wish to try to decide what you may require per week/7 to get how much you may need to charge. 6kWh over 4 hours can recover what average use is.

 

[FlasherZ]

So, your saying you can add more load to the subpanel after installing the charger to it?

No, you can't if 100A feeder and 100A charger - I was responding to the question of adding extra to the subpanel just for charging (or maybe i misread it). Feeder for the subpanel must be 125 percent of continuous load plus calculations required for other loads (like lighting) as found in sec 220.

 

[Simsonic]

I added a sub-panel with a 60A breaker, so the electrician set the Ford CSP at rating 5 which is 48A. It charges pretty darn fast and I am happy with how it all works seamlessly (so far).

 

[fubar79]

I added a sub-panel with a 60A breaker, so the electrician set the Ford CSP at rating 5 which is 48A. It charges pretty darn fast and I am happy with how it all works seamlessly (so far).

I'm finally getting the Ford CSP installed today, and it will be set at 48A as well. The mobile unit has been sufficient thus far for my needs, but with the lower temps at night, and winter just around the corner, charging at 48A should be sufficient.

 

[ScubaSteve_TheReal]

I think the sweet spot is 48A charging, on a 60A breaker.
Tesla wall connector +J-1772 adapter being the winning combination.
https://www.tesla.com/support/home-charging-installation/wall-connector
(then you will be all setup for your next tesla vehicle )

48A x 240v = 11.5kw

Most homes are incapable of adding a new 100A dedicated charging circuit to run the pro.

Love this idea. I’m still using 32amp. 48amp definitely would be great. Not sure I need the 80amp that’s still in the box…. Everything is on hold for now.

Sponsored