QUESTIONS AND ANSWERS ON INSTALLING ELECTRIC VEHICLE SUPPLY EQUIPMENT ppt

Typically, installing an electric vehicle supply equipment EVSE, commonly referred to as EV charging stations, is a straightforward process; however, unique challenges may pop up.. Yes,

FOR OVER 100 YEARS LIFE POWERED BY EDISON.

FOR OVER 100 YEARS…LIFE POWERED BY EDISON.

QUESTIONS AND ANSWERS

ON INSTALLING ELECTRIC

VEHICLE SUPPLY

EQUIPMENT

Table of Contents:

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Contact Information: We know you may have some additional questions about EVSEs and we’re here to help Please contact us

at PEVReadiness@sce.com

or call1800-4EV-INFO.

Plug-in Electric Vehicles are here, and more

are on the way SCE wants to help make

charging them simple, safe and economical

for customers

EVs offer the convenience and ease of

charging from home But, there are several

decisions customers will need to make about

their home charging infrastructure before

they bring them home SCE is working with automakers, car dealers, electric vehicle service providers and local cities to help educate customers

SCE has a comprehensive website to help customers and cities understand the home charging station installation process Visit

www.sce.com/ev

Typically, installing an electric vehicle supply equipment (EVSE), commonly referred to

as EV charging stations, is a straightforward process; however, unique challenges may pop up Following are answers to some

of the questions you may have about the process

I Installing Charging Stations

II Load Calculations and Analysis

III Permitting

IV Safety

V Electric Rules and Service Requirements

VI Second Meter Installations

VII Miscellaneous

Intro

Helping Customers Navigate the Ins and Outs of Fueling Electric Vehicles

Yes, we have a number of publications and information on SCE.com/EV to help you You can find a list of companies manufacturing and/or installing EVSE at www.pluginamerica.org/accessories

Yes, the EVSE can be moved, but first check with your local city or county to see if there are any specific rules and regulations In general, it’s easier to move a hard-connected EVSE than a hard-wired EVSE

Additionally, carefully consider moving equipment from one location to another since the customer’s and/or SCE’s electrical equipment may not be sized for the alternate location

If customers do decide to move their EVSEs, they’ll need to inform SCE Tariff Rule 3C states:

“Change in Customer’s Equipment or Operations The customer shall give SCE written notice of the extent and nature of any material change in the size, character, or extent of the utilizing equipment or operations for which SCE is supplying electric service before making any such change.”

I Installing Charging Stations

Many municipalities, businesses, multi-family housing units and individual homeowners are expressing interest in installing charging

stations for electric vehicles

Does SCE provide charging

station installation information?

Can Electric Vehicle Supply

Equipment (EVSE) be moved?

For example, when someone

sells their house, or visits

their vacation home?

Table of Contents ! Installing Charging Stations

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Because each property is different, please ask a qualified electrician whether the property can accommodate an A/B switch, as well as your local city or county to see if they allow it If customers

do decide to install an A/B switch, they’ll need to inform SCE Tariff Rule 3C states: “Change in Customer’s Equipment or Operations The customer shall give SCE written notice of the extent and nature of any material change in the size, character, or extent of the utilizing equipment or operations for which SCE is supplying electric service before making any such change.”

If the installation is permitted and inspected, then the residential customer has two rate options:

the residential rate (D) or the TOU-D-TEV rate We encourage our customers to call SCE to learn more about their rate options

An A/B switch could be used with a traditional residential rate (D) or one of SCE’s electric car rates—TOU-D-TEV—but is not allowed with the other electric car rate—TOU-EV-1—which is separately metered and not allowed for other appliances

Yes, we can if the panel is not compliant with SCE’s ESR However, we try to work closely with

electricians to make sure this doesn’t happen You can read the ESR here As an electrician or

do-it-yourself homeowner, you also need to make sure your customer is compliant with SCE’s ESR

While we don’t handle those issues, we recommend that you ask your local city or county whether they allow hard-connected instead of hard-wired EVSE in residential applications under NEC article 625

It’s important to note that cities and counties require the EVSE, plus the installation instructions, to be approved by Underwriters Lab (UL) or another nationally recognized testing lab UL approval for a hard-connected EVSE that meets NEC article 625 requirements is still unclear

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Is it possible to have a switch

to alternate between the charging

of two PEVs (an A/B switch so

the PEVs can be charged one

after another)?

If the panel is not compliant

with SCE’s Electrical Service

Requirements (ESR), can

SCE require the customer

to move the panel?

EVSE has the potential to

be connected by a 12” line to

an outlet; does NEC article 625

allow “hard connected” instead

of “hard wired” EVSE in

residential applications?

! Installing Charging Stations Table of Contents

Depending on the city, most permit applications usually require an electrician to perform a load analysis

To not delay the permitting process, electrical contractors should check with the city or county’s permit department

The installing electrician should provide the local authority with detailed information such as the existing load, the additional charging load, wire and circuit breaker size There are checklists similar to ones used already in some cities for hot tubs that help the local authority to determine if the load is adequate You

can find check list examples in the California Electric Code’s appendix, from the International Code

Council (ICC) or specific cities.

Yes, if customers let SCE know about their PEV purchase, we will visit the PEV customer site to evaluate whether SCE’s electrical equipment loads are sized to meet the EV demand We can also provide (kW) information, upon customer request However, SCE’s experience is that the type of load calculation that SCE planners perform does not satisfy the requirements of permit and inspection desk staff at cities or counties

II Load Calculations and Analysis

SCE requires that load calculations and analysis must be performed prior to installing EVSE to determine whether the customer’s existing electric

service panel has sufficient capacity to add EV charging or if it will need to be upgraded

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Do cities have plan checks that

require load analysis?

How does the local permitting

department know how much

PEV charging will overload a

dedicated or non-dedicated

circuit?

Does SCE do load calculations

and visit every charging site?

Can SCE provide load (kW)

information from the current or

new smart meters in residences

to help the permit and inspection

staff at the city or county with

their load calculation?

II Load Calculations and Analysis Table of Contents

We’ve designed our electric distribution system according to the SCE Distribution Design Standards, and base design on current expected loads as well as potential growth in an area Because needs change, these standards are dynamic and are being updated as we build the Smart electrical system

If you’re interested in regulations, Rules 15.A.1.a and 16.A.1 state that SCE will be responsible for planning, designing, and engineering Distribution Line and Service Extensions using SCE’s standards for design Additionally, Section DDS-8 2.0 of SCE’s Design Standards notes that service cables shall

be selected to meet the expected demand without exceeding the voltage drop and flicker criteria, as described in the same section

Sometimes the existing SCE service

can’t support a load that can be

served by a panel How does SCE

design its distribution system

capacity?

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II Load Calculations and Analysis Table of Contents

We do not provide guidelines or drawings regarding EVSE installation Our information pertains to SCE’s side of the meter and includes requirements for electric panel locations and acceptable panel connections to Edison’s service

Yes, it is possible for a customer to charge their PEV at Level 1 without a permit because EVs come with

an electric cord that the customer may plug into an existing 120v socket It’s important that an electrician evaluates the circuit to determine if it can safely charge the EV, and upgrade the circuit, as needed Level

2 charging involves additional wiring and equipment that usually requires a permit so check with your local city or county about permit requirements

The customer or electrician should check with the city or county, as a plan check and/or a work analysis may be required if the residential electrical panel is very large (e.g 400 amps)

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Are drawings available to help

the inspectors, electricians and

customers understand the most

common single family or

multi-family EVSE installations?

Can you install a

level 1 (120 volts)

or 2 (240 volts) EVSE

installation without permits?

In addition to a permit, is a plan

check and work analysis required

if the residential electrical panel

is very large (e.g 400 amps)?

III Permitting

Depending on the city or county, the EVSE installation permitting process can vary from being straightforward to slightly more complex The key

is to check with each permitting department to find out its requirements

III Permitting Table of Contents

Each local city or county has different requirements so we suggest you contact the appropriate permitting authority

If you have an older home, first consult with a qualified electrician and, if needed, with the local city or county The small size of the panels in smaller, older homes may mean an electrical panel upgrade is needed

Yes, SCE would use the permit information to cross check SCE’s database to identify SCE customers who have not notified the utility regarding their PEV purchase SCE will then review the customer’s historical kilowatt hour usage/load/demand and the additional PEV charging load to ensure that SCE’s electrical equipment is capable of handling the demand As a result, an upgrade to the customer’s electrical equipment may be needed

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Do electricians need to submit

single line drawings?

How should customers and

electricians handle older homes

with glass fuses instead of

breakers?

Would notifying SCE about

all customers’ requests for

a permit for EVSE-related

installations help SCE’s

distribution planning process?

III Permitting Table of Contents

IV Safety

Keeping our customers and employees safe is the most important thing we do at SCE

Please consult with your local authority, as well as SCE, about fire code requirements since city or local requirements may include the need to clearly label the panels to alert emergency personnel

of the existence of two panels Since SCE’s tariffs do not allow for a separate service installation to new dedicated EV panel, both panels should be in proximity to each other A homeowner installing

EV panels without consulting SCE and or the city/local authority may be required to relocate the panels

What actions are required if

two panels at a residence or

business are not in the same

location? This may cause

safety problems for the fire

department in an emergency.

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IV Safety Table of Contents

The requirements vary based on location and situation If you have a question, please contact SCE at 1-800-4EV-INFO

We encourage all our customers to hire qualified, licensed electricians and to verify their credentials

We also require all electrical work to comply with the SCE Electrical Service Requirements and

other technical specifications You can review SCE’s electrical service requirements here.

We always believe there’s a way to improve a process Ideally, the customer contacts us to let us know

he or she wants to buy an EV and provides the name of the selected electrician This information goes

to the SCE planner who will visit the customer site to evaluate SCE’s infrastructure The SCE planner will identify possible locations for a second panel, which is needed if the EV-TOU-1 rate is selected,

as well as contact the electrician to discuss the situation, as needed

V Electric Rules and Service Requirements

Like other utilities throughout the nation, SCE has a number of electrical service requirements If you’d like to review them,

you can find them here Following are some additional questions relating to SCE’s electrical rules and requirements.

When does SCE require that

residential PEVs underground

the overhead electrical service?

Does SCE offer qualified

electricians specific EVSE

station installation requirements?

Is there a way to improve

communications between

SCE Planners and electricians?

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V Electric Rules and Service Requirements Table of Contents

For commercial charging station installations, customers should contact SCE planners as early as possible Electric vehicle rates contain provisions on the ownership of vehicles to be charged

So commercial (non-residential) charging would be allowed on an existing residential rate

We also encourage customers to read tariffs carefully for any restrictions or special conditions when deciding to add load to existing accounts/rates Street lighting and traffic control rates are for these applications only, and agricultural and pumping rates contain provisions regarding appropriate use

A customer with an existing commercial service account may allow charging on that account

However, no commercial (non-residential) charging would be allowed on an existing residential rate

Possibly, but the customer must consult with an electrical contractor, SCE and the city or local authority to see if it is allowed High-level charging (30-50 kW) is a significant electrical load

Additionally, a customer must notify SCE under Rule 3C which states: “Change in Customer’s Equipment or Operations The customer shall give SCE written notice of the extent and nature

of any material change in the size, character, or extent of the utilizing equipment or operations for which SCE is supplying electric service before making any such change.”

Under CPUC approved rules, SCE does not pay for electrical equipment on the customer side

of the meter Rule 16 addresses customer requirements for work on the customer side of the

meter whether overhead or underground

In general, SCE does not require this, but please check with your local city or county However,

If we cannot serve the requested upgrade with overhead facilities due to the size of the required transformation, we will require the upgraded service to go underground

When commercial and governmental SCE customers contract with charging station companies, will the customer have to “piggyback” onto existing SCE rates, such

as irrigation, traffic light

or street lamp rates?

Can hobbyists or small start-ups do high level

DC charging (between 30-50 kW) in their home?

Concern has been expressed about cost to upgrade the customer’s panel if service is underground Will SCE pay for this upgrade? If so how much?

Does SCE require a city or county to go from overhead

to underground service for large residential remodels?

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V Electric Rules and Service Requirements Table of Contents