Do you handle electrical plan review comments if our permit submittal gets rejected?

Yes. Permit revision packages and responses to plan review comments are included in our standard electrical permit drawing engagement.

What information do you need to start an electrical permit drawing package?

A floor plan, your existing or proposed service size, and an equipment list covering anything with a significant electrical load, such as HVAC equipment, EV chargers, or a generator.

Stamped Electrical Drawings In The US

Precise Electrical Permit Drawing Services

Every circuit on an electrical permit set has to trace back to a number: a connected load, a demand factor, a breaker size that matches the wire ahead of it. CAD Drafter’s electrical permit drawing services build that math into every sheet, so the electrical permit stamped drawings a reviewer opens already answer the questions they were going to ask.
Single-line diagrams, lighting layouts, panel schedules, EV charger electrical design, and generator electrical design make up the bulk of what crosses our desk, and each one gets the same treatment: sized to the actual load, referenced to the code section that governs it, and formatted the way your jurisdiction’s electrical plan review process expects to see it.

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What Our Electrical Permit Drawings Actually Cover

CAD Drafter produces the electrical design drawings and the load calculations behind them; we coordinate seal and signature through our licensed Professional Engineer partners for jurisdictions that require stamped electrical drawings. Architects, contractors, and property owners send us a floor plan and an equipment list; we return electrical engineering permit drawings ready for submittal. Know more about the detailed MEP engineering services in our designated page.

Why Contractors Outsource Electrical Permit Plans

A permit set that undersizes a service or skips a required load calculation gets bounced at electrical plan review, and every bounce costs a project a week or more. Outsourcing to a team that produces electrical sealed drawings for a living, rather than as a side task on a broader design package, tends to mean fewer of those bounces.

Our Electrical Permit Drawing Services Include

Electrical Single-Line Diagrams
Electrical Lighting Layouts
Electrical Panel Schedules
EV Charger Electrical Design
Generator Electrical Design
Branch Circuit & Load Calculations
Electrical Service Upgrades
Complete Electrical Permit Drawings

Sample Upload Plan

Call Us For Electrical Engineering Stamped Drawings!

Our Specialzied Electrical Permit Drawings Services

Electrical Single-Line Diagram Services

An electrical single-line diagram, sometimes called a one-line diagram, is the drawing a utility company and a plan reviewer both check first, because it shows the entire power distribution path in one view: service entrance, meter, main disconnect, and every panel downstream of it.

We size conductors, overcurrent protection, and equipment ratings against the calculated load at every point in that path, so the single-line diagram isn’t just a schematic, it’s a document that proves the service size is adequate before a single wire gets pulled.

Electrical Lighting Layout Services

A lighting plan does two jobs at once: it has to meet the footcandle levels a space needs to function, and it has to satisfy the emergency and exit lighting requirements a life safety inspector checks independently of everything else on the sheet.

Commercial lighting design on our end includes fixture selection, circuiting, and switching layout, along with the site lighting design that covers parking lots and building exteriors where photometric compliance and dark-sky ordinances both come into play.

Electrical Panel Schedule Design

An electrical panel schedule is a load schedule and a circuit schedule at once: every breaker position accounted for, every connected load documented, and the panel’s total demand load calculated against its rated capacity.

We build panel schedules that a plan reviewer can check against the single-line diagram in seconds, because the load calculations behind both drawings were run from the same source data instead of reconciled after the fact.

EV Charger Electrical Design

EV charging station electrical design starts with a load calculation most homeowners and property managers don’t expect: adding a Level 2 charger to an existing panel often means confirming the service has enough spare capacity, or adding load management equipment that doesn’t.

EV charger load calculations, dedicated circuit sizing, and EV permit drawings are prepared together, whether the project is a single residential charger or a multi-unit EV charging station design for a commercial parking structure.

Generator Electrical Design

Standby generator design hinges on one drawing more than any other: the transfer switch detail showing exactly how backup power isolates from the utility service, since a transfer switch wired incorrectly is a life-safety hazard for utility line workers, not just a code violation.

Generator permit drawings from our team include the transfer switch configuration, generator sizing against the connected emergency or standby load, and the fuel system coordination a generator installation often needs alongside the electrical scope.

Need Permit-Ready Electrical Plans, Fast?

Don’t let pending electrical drawings hold up your job site. Our team delivers fully compliant, code-referenced electrical permit packages (including EV charger and generator designs) in as little as 24 to 48 hours.

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Standard-Referenced Design

Every Electrical Drawing Checked Against The Code That Governs It

A single-line diagram, a lighting layout, and a generator transfer switch detail each answer to a different article of the same code book, and a reviewer checking one won’t accept a citation meant for another. We reference the section that actually applies.

NEC / NFPA 70

National Electrical Code provisions governing conductor sizing, overcurrent protection, panel schedules, and grounding on every electrical engineering drawing we produce.

NEC Article 625

Electric vehicle charging equipment provisions governing branch circuit sizing, load management, and disconnect requirements for EV charger electrical design.

NEC Articles 700, 701 & 702

Emergency, legally required standby, and optional standby power system provisions referenced on every generator electrical design and transfer switch detail.

NFPA 110

Standard for emergency and standby power systems, referenced for generator sizing and installation requirements beyond the NEC’s own provisions.

NFPA 101 (Life Safety Code)

Emergency and exit lighting requirements coordinated with the electrical lighting layout to confirm egress illumination meets life safety criteria.

IES Lighting Handbook

Illuminating Engineering Society footcandle and lighting quality recommendations referenced for commercial lighting design and site lighting layouts.

UL 2202 & UL 2594

Underwriters Laboratories safety standards for EV charging equipment and outdoor power equipment referenced when selecting and specifying EV charging hardware.

Deliverable Types

Electrical Permit Drawing Deliverables We Produce

Every electrical package is broken into the sheets your plan reviewer needs and the sheets your electrician needs, coordinated from one load calculation.

All

Electrical Single-Line Diagram

Service entrance to panel distribution shown in one-line format, sized against the calculated connected and demand load.

Electrical Lighting Layout

Fixture placement, circuiting, and switching for interior spaces, plus emergency, exit, and site lighting where required.

Electrical Panel Schedule

Circuit-by-circuit breaker assignment and connected load documentation cross-referenced to the single-line diagram.

EV Charger Permit Drawings

Dedicated circuit sizing, load management coordination, and disconnect details for residential and commercial EV charging installations.

Generator Permit Drawings

Generator sizing, transfer switch configuration, and emergency or standby circuit designation for backup power systems.

Load Calculations

Connected and demand load calculations supporting service size, panel capacity, and every downstream circuit on the drawing set.

Residential

Single-Family Homes

Full Service & Branch Circuit Design
EV Charger, Generator

ADUs & Guest Houses

Sub-Panel & Branch Circuit Design
EV Charger Circuit

Multi-Family Residential

Per-Unit Panel & Common Area Lighting
Site Lighting Design

Apartments & Condominiums

Coordinated Panel Schedules Across Units
EV Charging Station Design

Tenant Improvement (TI) Projects

Panel Modification Within Existing Service
Lighting Layout Revision

Mixed-Use Developments

Residential & Commercial Service Coordination
Generator, EV Charging

Commercial

Office Buildings

Power Distribution & Commercial Lighting Design
Generator Backup Power

Retail Stores

Branch Circuit & Site Lighting Design
EV Charging Station Design

Restaurants & Cafés

Kitchen Equipment Circuits & Lighting Layout
Standby Generator

Coffee Shops

Compact Panel & Equipment Circuit Design
Site Lighting Design

Medical & Dental Clinics

Emergency Power & Low Voltage Coordination
Standby Generator

Hotels & Hospitality

Guest Room Panels & Corridor Lighting
EV Charging Station Design

Specialty & Institutional

Warehouses & Industrial Facilities

High-Amperage Service & Equipment Circuits
Standby Generator

Schools & Educational Facilities

Classroom Lighting & Emergency Power
Emergency Lighting System

Daycare Centers

Life Safety Lighting & Branch Circuits
Exit Lighting System

Religious Buildings

Sanctuary Lighting & Sound-Coordinated Circuits
Standby Generator

Warehouses with Office Build-Out

Mixed Industrial & Office Electrical
EV Charging Station Design

Fleet & Depot Facilities

Multi-Charger Electrical Coordination
Commercial EV Charging Design

Our Process

How CAD Drafter Delivers Electrical Permit Drawings

Our workflow exists to get an electrical plan review approved without a comment letter over a load calculation nobody ran. Here’s the 4-step process our electrical team follows:

Floor Plan & Equipment Review

We review your floor plan, service size, and equipment list, confirming whether an EV charger, generator, or service upgrade changes the governing load calculation before drafting starts.

Package Quote & Timeline

You receive a scoped price and a release date broken down by single-line diagram, lighting layout, and panel schedule milestones.

Design & Internal QC

Our team designs the electrical system and runs load calculations for every panel and circuit, then passes every sheet through an internal code cross-check before it reaches your desk.

Release, PE Coordination & Revisions

You receive editable plan files, with PE seal coordination and plan review comment responses included per your project’s engineering agreement.

4,800+

Electrical Permit Drawing Packages Released

1,900+

Panel Schedules & Single-Line Diagrams Completed

700+

EV Charger & Generator Designs Prepared

10-48 Hrs

Standard Package Release

CAD Drafter For Electrical Permit Drawings

98%
Permit Approval
First Time

Why Choose Us

Why Contractors & Property Owners Choose CAD Drafter For Electrical Permit Drawings

Electricians, general contractors, and property owners keep sending us their electrical permit drawing scope for a specific reason. Unlike firms that draft a single-line diagram and a panel schedule as two disconnected sheets, our team runs one load calculation that both drawings are built from.

We Draft, Your PE Confirms

We never guess at load calculations. Every electrical permit drawing carries the connected and demand load your project’s actual equipment supports, coordinated with a licensed Professional Engineer for stamped electrical drawings where required.

Code-Referenced Electrical Drafting

Sheets reference NEC/NFPA 70, NEC Article 625, NEC Articles 700 through 702, NFPA 110, NFPA 101, and UL 2202/2594 as each applies to your project’s electrical scope.

Residential Through Industrial Range

Single-family service upgrades and EV charger circuits, alongside coordinated power and lighting design for hotels, schools, and industrial facilities.

Scalable Drafting Capacity

Take on a single panel schedule revision or a full electrical permit drawing package without adding an electrical designer to your own office.

Software Our Electrical Drafting Team Works In

AutoCAD Electrical

Revit MEP

SKM PowerTools

EasyPower

ETAP

Benefits Of Outsourcing To The Team

Why Firms Outsource Electrical Permit Drawing Services

Keeping an electrical designer on staff who tracks NEC updates and every jurisdiction’s plan review checklist is a narrow hire against a permitting pipeline that moves in bursts. Outsourced electrical permit drawing services let contractors and property owners flex drafting capacity without carrying that specialty as fixed overhead.

Lower Drafting Overhead: A per-package rate instead of a salaried electrical designer on staff.

Faster Plan Release: A dedicated electrical team means your permit drawings aren’t queued behind someone else’s deadline. Standard packages release in 24-48 hours.

Built-In QC Review: Every drawing passes an internal load calculation and code cross-check before it reaches your desk for approval.

Technologies Our Electrical Drafting Team Works With

Connected & Demand Load Calculation Modeling
Single-Line Diagram & Short-Circuit Coordination
EV Charger Load Management Modeling
Generator Sizing & Transfer Switch Coordination
Photometric Lighting Calculation
Cloud-Based Plan Review & Markup

Sample contact Us

Our Certificate

1 2 3

Client Feedback To Our HVAC Design Load Calculations Services

★ ★ ★ ★ ★

Panel schedule and single-line diagram matched each other exactly, so the reviewer’s usual back-and-forth over load calculations never happened on this one.

Cassandra ReyesElectrical Contractor

★ ★ ★ ★ ★

EV charger load calculation caught that our existing panel didn’t have the spare capacity we assumed, which saved us from a failed inspection down the line.

Julian FerreiraProperty Manager

★ ★ ★ ★ ★

Generator transfer switch detail was exactly what our utility company wanted to see before they’d sign off on the interconnection.

Denise OkaforGeneral Contractor

Frequently Asked Question

What is an electrical single-line diagram, and why does my permit need one?

An electrical single-line diagram, also called a one-line diagram, shows the entire power distribution path from the utility service to every downstream panel. Most jurisdictions require it to verify service size, conductor sizing, and overcurrent protection before issuing a permit.

Do you provide stamped electrical drawings, or only unstamped design drawings?

Our in-house team prepares the electrical design drawings and load calculations, and we coordinate seal and signature through our licensed Professional Engineer partners for jurisdictions that require stamped electrical drawings.

Do I need a load calculation to add an EV charger to my existing panel?

In most cases, yes. EV charger load calculations confirm whether your existing service has spare capacity for the added circuit, or whether load management equipment is needed to avoid a service upgrade.

What’s included in generator electrical design for a standby power system?

Generator electrical design includes sizing the generator against the connected emergency or standby load, and detailing the transfer switch configuration that isolates backup power from the utility service.

Can you provide electrical permit drawings for a commercial tenant improvement project?

Yes. Tenant improvement projects often require panel schedule modifications and lighting layout revisions within an existing electrical service, which is a common scope for our team.

Precise Electrical Permit Drawing Services

What Our Electrical Permit Drawings Actually Cover

Why Contractors Outsource Electrical Permit Plans

Our Electrical Permit Drawing Services Include

Call Us For Electrical Engineering Stamped Drawings!

Our Specialzied Electrical Permit Drawings Services

Electrical Single-Line Diagram Services

Electrical Lighting Layout Services

Electrical Panel Schedule Design

EV Charger Electrical Design

Generator Electrical Design

Need Permit-Ready Electrical Plans, Fast?

Every Electrical Drawing Checked Against The Code That Governs It

Electrical Permit Drawing Deliverables We Produce

Electrical Single-Line Diagram

Electrical Lighting Layout

Electrical Panel Schedule

EV Charger Permit Drawings

Generator Permit Drawings

Load Calculations

How CAD Drafter Delivers Electrical Permit Drawings

Floor Plan & Equipment Review

Package Quote & Timeline

Design & Internal QC

Release, PE Coordination & Revisions

Why Contractors & Property Owners Choose CAD Drafter For Electrical Permit Drawings

Software Our Electrical Drafting Team Works In

Why Firms Outsource Electrical Permit Drawing Services

Technologies Our Electrical Drafting Team Works With

Our Certificate

Client Feedback To Our HVAC Design Load Calculations Services

Frequently Asked Question

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