Lighting Circuit Voltage Drop

fast.engineer Calculations / Lighting Circuit Voltage Drop

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Supply voltage *

Power factor

Typically 0.95-1.0 for LED lighting

Frequency

Operating temperature

°C

For cable resistance correction

Conductor material

Conductor CSA (mm²) *

Voltage drop limit

Lights in order from the supply. Length is the cable from the previous light (or from the supply for light 1); 0 m places the light at the supply.

Light [[ index + 1 ]]

Power

Length

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Calc number

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Title

Description

Revision

Company name

Project number

Prepared by

Project name

Client company

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Calculation No.: Calc-001
Revision: A
Description:
Created By: Engineer Name

Project: Project Name
Project No.: P001
Client: Client Name

Lighting Circuit Voltage Drop Calculation

Input Parameters

Parameter	Symbol	Value	Notes

Light Configuration

Parameter	Symbol	Value	Notes

Calculations

Cable Resistance

Current in Cable Sections

Section 1 Current (Supply to Light 1)

Section 2 Current (Light 1 to Light 2)

Section 3 Current (Light 2 to Light 3)

Section 4 Current (Light 3 to Light 4)

Voltage Drop in Each Section

Light 1 - Section Voltage Drop

Light 2 - Section Voltage Drop

Light 3 - Section Voltage Drop

Light 4 - Section Voltage Drop

Cumulative Voltage Drop

Light 1 - Cumulative Voltage Drop

Light 1 - Voltage at Light

Light 1 - Percentage Voltage Drop

Light 2 - Cumulative Voltage Drop

Light 2 - Voltage at Light

Light 2 - Percentage Voltage Drop

Light 3 - Cumulative Voltage Drop

Light 3 - Voltage at Light

Light 3 - Percentage Voltage Drop

Light 4 - Cumulative Voltage Drop

Light 4 - Voltage at Light

Light 4 - Percentage Voltage Drop

Compliance Check

Summary of Results

Parameter	Symbol	Value	Notes

Detailed Results by Light Position

Parameter	Symbol	Value	Notes

Approval:

Created By
Engineer Name
Date: ..........................

Checked
By: .............................
Date: ..........................

Approved
By: .............................
Date: ..........................

Client Approved
By: .............................
Date: ..........................

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