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Understanding the LADBS NEC Standard Electrical Load Calculation form is crucial for anyone involved in electrical installations or renovations in Los Angeles. This form serves as a comprehensive tool for calculating the electrical load requirements of residential and commercial buildings, ensuring compliance with the National Electrical Code (NEC). By accurately assessing the anticipated load, users can effectively determine the necessary service size, which is vital for safety and efficiency. The form includes sections for detailing various loads, such as lighting, receptacles, and appliances, allowing for a thorough evaluation of electrical demands. Additionally, it provides guidelines on how to account for future expansions, ensuring that the electrical system can accommodate growth without compromising safety. With clear instructions and a structured format, the form simplifies the process of load calculation, making it accessible for contractors, engineers, and homeowners alike. Properly completing this form not only helps in obtaining the necessary permits but also plays a key role in fostering safe electrical practices in the community.

Common mistakes

  1. Failing to accurately determine the total connected load. Users often overlook some appliances or equipment, leading to an underestimation of the required load.

  2. Not considering diversity factors. Many individuals neglect to apply diversity factors, which can result in inflated load calculations.

  3. Incorrectly categorizing load types. Some people misclassify loads, such as treating continuous loads as non-continuous, which affects the overall calculations.

  4. Omitting future expansion considerations. Failing to account for potential future load increases can lead to insufficient capacity in the long run.

  5. Using outdated or incorrect codes and standards. Relying on previous versions of the NEC or local codes may result in non-compliance and errors in calculations.

  6. Neglecting to include non-electrical loads. Some users forget to factor in loads from heating, cooling, or other systems that may impact the electrical load.

  7. Not double-checking calculations. Errors can easily occur during manual calculations. Verification helps ensure accuracy and compliance with the requirements.

Example - LADBS NEC Standard Electrical Load Calculation Form

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

More About LADBS NEC Standard Electrical Load Calculation

What is the LADBS NEC Standard Electrical Load Calculation form?

The LADBS NEC Standard Electrical Load Calculation form is a document used by the Los Angeles Department of Building and Safety to determine the electrical load requirements for a building or structure. This form helps ensure that the electrical system can safely handle the expected load, which is crucial for compliance with safety standards and regulations.

Who needs to fill out this form?

This form must be completed by licensed electricians or electrical engineers when applying for electrical permits in Los Angeles. It is essential for residential, commercial, and industrial projects where new electrical installations or modifications are planned.

What information is required on the form?

The form requires details such as the type of occupancy, the square footage of the space, the number of circuits, and the load calculations for various electrical devices. Accurate data is crucial for determining the total load and ensuring compliance with the National Electrical Code (NEC).

How do I calculate the electrical load?

To calculate the electrical load, you will need to consider all the appliances, lighting, and equipment that will be used in the building. Each item has a specific wattage rating, which you can find on the appliance or in the manufacturer’s specifications. Add these wattages together to determine the total load. The form provides guidelines and formulas to assist in this calculation.

What happens if I do not submit this form?

Failure to submit the LADBS NEC Standard Electrical Load Calculation form can result in delays in obtaining electrical permits. Additionally, it may lead to non-compliance with local codes, which could result in fines or the need for costly modifications to your electrical system.

Where can I find the form?

The form is available on the Los Angeles Department of Building and Safety's official website. It can be downloaded and printed for completion. Ensure you are using the most current version of the form to avoid any issues during the permit application process.

Key takeaways

Filling out and using the LADBS NEC Standard Electrical Load Calculation form is an important step in ensuring that electrical systems are safe and efficient. Here are some key takeaways to keep in mind:

  • Understanding the purpose of the form is crucial. It helps determine the electrical load requirements for a building or project.
  • Accurate measurements are essential. Ensure that all calculations reflect the actual needs of the electrical system.
  • Review the local codes and regulations. Compliance with these rules is necessary to avoid penalties and ensure safety.
  • Document all assumptions and calculations clearly. This transparency can be helpful for future reference and inspections.
  • Seek assistance if needed. Consulting with a licensed electrician or engineer can provide valuable insights and ensure accuracy.

Form Attributes

Fact Name Description
Purpose The LADBS NEC Standard Electrical Load Calculation form is used to determine the electrical load requirements for new and existing buildings in Los Angeles.
Compliance This form ensures compliance with the National Electrical Code (NEC) and local regulations set by the Los Angeles Department of Building and Safety (LADBS).
Load Types The form covers various load types, including lighting, receptacles, and appliances, to provide a comprehensive load calculation.
Required Information Applicants must provide details such as square footage, number of circuits, and types of equipment to complete the form.
Review Process Once submitted, the LADBS reviews the form to ensure it meets all safety and regulatory standards.
Approval Timeline The approval process typically takes a few weeks, depending on the complexity of the project and the volume of applications.
State Law Reference This form is governed by California state laws, including the California Electrical Code, which aligns with the NEC.
Submission Method The form can be submitted online through the LADBS website or in person at designated building and safety offices.

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Dos and Don'ts

When filling out the LADBS NEC Standard Electrical Load Calculation form, it is important to follow certain guidelines to ensure accuracy and compliance. Here are five things to do and five things to avoid:

Things to Do:

  • Read the instructions carefully before starting.
  • Provide accurate information about the electrical load requirements.
  • Double-check all calculations for accuracy.
  • Use the correct units of measurement as specified in the form.
  • Submit the form by the required deadline to avoid delays.

Things to Avoid:

  • Do not leave any sections of the form blank.
  • Avoid using unclear or ambiguous language.
  • Do not guess or estimate figures; provide actual data.
  • Refrain from submitting the form without a thorough review.
  • Do not ignore the specific requirements for different types of loads.