Technological Drivers-

Electrical Construction

Industry

• Electric Vehicles

• Smart Grid

• Renewable Energy Sources

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Early Public Charging Station 1914

EVSE Charging Levels

• Level 1 – 120 V @ 15 Amps- 12 hrs.

• Level 2 - 1Ø, 208V.- 240V. @ 30 – 80 Amps –

4 hrs.

• Advanced EVSE – 3Ø, 208 V. or 480 V.

@100-150 Amps- 30 minutes

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Eaton Level II EVSE

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Eaton Level II EVSE

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Eaton EV DC Quick Charger

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Eaton EV DC Quick Charger

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3 Phase, 480 V. Electrical Service for

EVSE

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26.6 kW Lithium Ion Battery Energy

Storage

Northerly Island EV Carport with Coulomb Level 2

EVSE

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Northerly Island’s Battery

Energy Storage –

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Northerly Island’s Battery

Energy Storage – 100 kW

Electrical Vehicle Infrastructure Training

Program (EVITP) Phase 1 and Phase 2

• Expands electrician skill set

• Insures safe and code compliant installations

• Addresses stakeholder and customer

concerns

• Promotes EV acceptance

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NEC and CEC Article 220: Branch Circuit,

Feeder, and Service Calculations

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Six individual calculations required

for minimum size residential service

or feeder conductors

1) General Lighting and General-Use

Receptacle Outlets

- Small Appliance

- Laundry Circuit

2) Fastened in Place Appliance Load

3) Electric Clothes Dryers

4) Electric Ranges

5) Noncoincident load calculations

6) Largest motor load calculation

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Commercial Shawbell’s Hardware Case Study

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Shawbell’s Hardware Case Study

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Shawbell’s Hardware Case Study

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Shawbell’s Hardware Case Study

DP#1

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Shawbell’s Hardware Case Study

PP#2

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Shawbell’s Hardware Case Study

PP#2

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EVSE Site Assessment Checklist

Obtain electrical bills for the last 12 months

Knowledge of how to access utility bill information

• Locate kWh usage

• Rate information such as tiered rates

• Time of Use (TOU)

Skills in calculating base electrical loads

Skills in basic math and spreadsheets

Communication skills

• Listen to customer’s needs

• Answer questions to their satisfaction

• Have a fact sheet ready describing the assessment process

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EVSE Site Assessment Checklist

What type of electric vehicle and EVSE

• Location of charging inlet on vehicle

What type of occupancy: residential or commercial

What type of usage; public or private

Verify customer utility and customer rate

Have EVSE specification and installation guidelines

Determine branch circuit requirements based on

EVSE Level 1, and Level 2 charger types

Verify the existing service/source and equipment

capacity

Note panel board manufacturer and circuit breaker

types

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EVSE Site Assessment Checklist

Identify heavy loads and unused loads

Locate circuit breaker space or the ability to add

more branch circuits for the EVSE

Visually inspect for potential electrical code violations

Draw single line showing panel board, disconnect(s),

and EVSE

Determine electrical permit history, zoning

regulations and legal property information

Take pictures of potential EVSE site as well as BOS

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