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NEC Standard Electrical Load Calculation for Single Family Dwellings

(Only for Service Ratings of 120/240V, 225 Amps Max)

 

 

Owner:

 

 

 

 

Location:

 

 

 

 

 

 

 

Total Floor Area of Dwelling (NEC 220.12)

 

 

 

 

 

 

 

 

 

SQFT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factor

 

 

 

 

 

 

 

 

Quantity

 

 

Volt Amperes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(VA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“General Lighting”

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

General Lighting (SQFT X 3 VA/SQ FT (Table 220.12)

3 X

sqft.

 

 

 

2.

Small Appliance Circuits (1500 VA per circuit)

(NEC

1500 X

 

 

 

 

 

220.52(A)) (minimum 2)

 

 

 

 

 

 

 

 

 

 

 

3.

Laundry Circuit (1500 VA per circuit) (NEC 220.52(B))

1500 X

 

 

 

 

4.

Total General Lighting Load (Add lines 1, 2 & 3):

 

 

 

 

 

 

 

 

5.

First 3000 VA @ 100%:

 

 

 

 

 

 

 

 

 

3000

6.

Total General Lighting Load – 3000 =

 

 

@ 35%=

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.

Net General Lighting Load (Per NEC 220.42) (Add lines 5 & 6):

 

 

 

 

 

 

 

 

 

 

 

 

*Fixed Appliances(if insufficient space, use back):

 

 

YES

NO

 

 

 

Garbage Disposal

 

 

 

 

 

 

 

 

 

 

 

 

 

Bathroom Fan

 

 

 

 

 

 

 

 

 

 

 

 

 

Microwave

 

 

 

 

 

 

 

 

 

 

 

 

 

Dishwasher

 

 

 

 

 

 

 

 

 

 

 

 

 

Other:

 

 

 

 

 

 

 

 

 

 

 

 

 

Other:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total

 

 

 

8.

3 or less Appliances,

Total Appliance VA;

 

 

 

 

 

 

 

 

 

 

 

 

4 or more Appliances,

75% of Total Appliance VA (NEC 220.53):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Other Loads (including motors, EV charger(s), etc.)

 

 

YES

NO

 

Nameplate Rating

 

 

 

(VA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9. Electric

Range (8000VA or Nameplate)**

 

 

 

 

 

 

 

 

 

 

 

10. HVAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11.

Electric

Oven

 

 

 

 

 

 

 

 

 

 

 

 

 

12.

Electric

Dryer (5000 VA minimum)**

 

 

 

 

 

 

 

 

 

 

 

13.

Electric

Vehicle Charger

 

 

 

 

 

 

 

 

 

 

14.

Other:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.

Other:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16.

25% of largest motor (NEC 430.24)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Service Load Volt-Amperes (VA) (Add lines 7, 8 & 9 thru 16) =

 

 

 

 

Total Service Load Volt-Amperes / 240-volts =

 

 

Amperes

 

 

 

 

***Service Rating (Amperes)=

*For every “YES” answer, indicate VA rating of equipment

**Nameplate rating must be used if larger

***Service Rating shall be greater than or equal to the Service load

As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on t he basis of disability and, upon request will provide reasonable accommodation to ensure equal access to its programs, services and activities.

NEC Standard Electrical Load Calculation (Rev. 03-23-2016)

www.ladbs.org

Documents used along the form

When embarking on electrical projects, especially those requiring compliance with local regulations, various forms and documents accompany the LADBS NEC Standard Electrical Load Calculation form. Each of these documents serves a specific purpose, ensuring that all aspects of the electrical system are thoroughly evaluated and documented. Below is a list of related forms that are commonly used alongside the Load Calculation form.

  • Electrical Permit Application: This document is essential for obtaining permission from local authorities to proceed with electrical work. It outlines the scope of the project and ensures compliance with safety regulations.
  • Plans and Specifications: Detailed drawings and descriptions of the electrical system must accompany the load calculation. These plans help inspectors understand the design and layout of the electrical installations.
  • Service Entrance Load Calculation: This calculation focuses on the electrical load at the service entrance of a building. It helps determine the appropriate size of the service equipment needed to handle the expected load.
  • Panel Schedule: A panel schedule lists all circuits connected to the electrical panel, including their respective loads. This document is vital for ensuring that the panel can handle the total load safely.
  • Inspection Request Form: After completing the electrical work, this form is submitted to request an inspection. It indicates that the work is ready for review by a qualified inspector.
  • Transfer-on-Death Deed: A legal form to designate beneficiaries for property transfer upon death, simplifying the process and avoiding probate complications. For more information, visit https://transferondeathdeedform.com/arizona-transfer-on-death-deed.
  • Certificate of Compliance: This document certifies that the electrical work meets all applicable codes and standards. It is often required to finalize the project and ensure safety.
  • Load Analysis Report: A comprehensive report detailing the load calculations, including demand factors and diversity factors, can provide additional clarity on the electrical system's requirements.
  • Energy Efficiency Compliance Form: This form ensures that the project meets energy efficiency standards, which may be mandated by local or state regulations.
  • Change Order Form: If there are modifications to the original project scope, this form documents the changes and any associated costs, ensuring all parties are informed and in agreement.

Understanding these documents and their roles in the electrical permitting process can streamline your project and help ensure compliance with local regulations. By preparing these forms carefully, you can facilitate a smoother approval process and contribute to the overall safety and functionality of the electrical system.

Similar forms

The LADBS NEC Standard Electrical Load Calculation form plays a crucial role in ensuring electrical systems are designed safely and effectively. It is similar to several other documents that serve comparable purposes in electrical planning and compliance. Here’s a look at six documents that share similarities with the LADBS form:

  • NEC Load Calculation Worksheet: This worksheet is used by electricians to determine the expected load on a system. Like the LADBS form, it includes calculations for various electrical components to ensure they meet safety standards.
  • Service Load Calculation Form: This form helps in assessing the total load that will be placed on a service panel. Both documents require detailed input about appliances and systems to ensure compliance with electrical codes.
  • Residential Electrical Load Calculation Guide: This guide provides homeowners and contractors with a framework for calculating electrical loads in residential settings. Similar to the LADBS form, it emphasizes safety and efficiency in electrical system design.
  • Commercial Electrical Load Estimation Form: Used in commercial settings, this form estimates the electrical load required for business operations. It parallels the LADBS form in its systematic approach to load assessment.
  • ATV Bill of Sale Form: Essential for documenting the transfer of ownership of an ATV in Arizona, this form ensures clarity in transactions and can be crucial for registration and tax purposes. To get started, download the document now.
  • Energy Audit Report: An energy audit assesses the efficiency of electrical systems and identifies areas for improvement. Like the LADBS form, it involves detailed calculations and analysis to promote energy efficiency.
  • Electrical Plan Review Checklist: This checklist is utilized during the review process of electrical plans. It ensures all necessary calculations, similar to those in the LADBS form, are included to meet regulatory requirements.

Each of these documents plays a vital role in the electrical planning process, ensuring that systems are not only functional but also safe and compliant with regulations.

Misconceptions

Misconceptions about the LADBS NEC Standard Electrical Load Calculation form can lead to confusion and errors in electrical planning and compliance. Here are seven common misconceptions:

  • 1. The form is only for new constructions. Many believe that the form is exclusively for new buildings. In reality, it is also applicable for remodels and upgrades where electrical loads are altered.
  • 2. Only licensed electricians can fill out the form. While licensed electricians often complete these forms, homeowners and contractors can also fill them out, provided they have a basic understanding of electrical load calculations.
  • 3. The form is optional. Some individuals think that using the form is optional. However, it is a requirement for obtaining permits in many jurisdictions, ensuring safety and compliance with electrical codes.
  • 4. All electrical loads must be calculated individually. A common misunderstanding is that each load must be calculated separately. In fact, certain loads can be grouped together, simplifying the process.
  • 5. The calculations are overly complicated. Many people assume that the calculations are too complex for the average user. However, the form is designed to be user-friendly, with clear instructions to guide users through the process.
  • 6. The form does not require supporting documentation. Some believe that the form can be submitted without any additional information. Supporting documentation, such as equipment specifications and load data, is often necessary to substantiate the calculations.
  • 7. Once submitted, the form cannot be revised. A misconception exists that once the form is submitted, it cannot be changed. In reality, revisions can be made if errors are discovered or if project specifications change.

Understanding these misconceptions can help ensure accurate and efficient use of the LADBS NEC Standard Electrical Load Calculation form, ultimately leading to safer electrical installations.

Understanding LADBS NEC Standard Electrical Load Calculation

  1. What is the LADBS NEC Standard Electrical Load Calculation form?

    The LADBS NEC Standard Electrical Load Calculation form is a document used to determine the electrical load requirements for a building or structure. This form helps ensure that the electrical system is designed to safely handle the anticipated load. It is important for compliance with local building codes and safety standards.

  2. Who needs to fill out this form?

    Typically, licensed electricians, electrical engineers, or contractors involved in the design or installation of electrical systems are responsible for completing this form. Homeowners may also need to fill it out if they are managing their own electrical projects. Proper completion of the form is essential for obtaining necessary permits.

  3. What information is required on the form?

    The form generally requires details about the type of occupancy, the square footage of the space, and the specific electrical loads associated with various appliances and equipment. Additionally, it may ask for information regarding the service entrance, branch circuits, and any special load considerations. Accurate data is crucial for an effective load calculation.

  4. How is the electrical load calculated?

    Electrical load is calculated by adding together the wattage of all devices that will be used in the building. This includes lighting, heating, cooling, and any other electrical appliances. The calculations must follow the guidelines set forth in the National Electrical Code (NEC) and local amendments. A thorough understanding of these guidelines ensures that the calculations are accurate and compliant.

  5. What happens after the form is submitted?

    Once the form is submitted, it will be reviewed by the local building department. They will assess whether the proposed electrical load meets safety standards and complies with the applicable codes. If everything is in order, permits will be issued, allowing the electrical work to proceed. If there are issues, the applicant may be required to make adjustments and resubmit the form.