Project GuideNEC 2023 · 2026 · Updated Apr 2026

Security Camera System: Complete Wiring Guide

Q: What wire size do I need for security camera system?

Use 14 AWG copper or 14 AWG aluminum on a 15A breaker at 120V. This is based on NEC 2023 Table 310.16 ampacity with 110.14(C) termination limits and 125% continuous load sizing per 210.19(A)(1).

Security Camera System: Use 14 AWG copper on a 15A breaker at 120V.

Wire (Cu)14 AWG

Wire (Al)14 AWG

Breaker15A

GFCINot required

Bill of materials

Modern IP camera systems use Power over Ethernet (POE) - one Cat6 cable carries both data and power to each camera. The NVR/POE switch needs a standard 120V outlet. Camera cables are NEC Class 2 low-voltage (Article 725), which means no electrician license required in most states, no conduit required, and you can run cables through walls freely.

POE cameras are low-voltage Class 2 per NEC Article 725. Use outdoor-rated Cat6 (CMX or direct burial) for exterior runs. Keep low-voltage cables 12 inches from line-voltage wiring per 725.136.

NVR/POE switch power

Component	Specification	NEC basis
Wire (copper)	14 AWG THHN	Table 310.16, 110.14(C)
Breaker	15A double-pole	240.4
Voltage	120V single-phase
Conduit (EMT)	1/2" EMT	Chapter 9 Table 4
Max distance (3% VD)	191 ft at 120V copper	210.19(A) Note 4

Installation notes

GFCI is not specifically required for this application by NEC, though local amendments may differ. Check with your local building department before starting work.

Standard 120V circuits use NM-B cable with 14/2 cable (hot, neutral, ground). For conduit runs, pull individual 14 AWG THHN conductors. All connections must be made in accessible junction boxes.

Run length matters: every foot of wire adds voltage drop, reducing power to your equipment. The table below shows the exact voltage drop at common distances. If your run exceeds the 3% threshold, upsize one gauge.

Voltage drop by distance

Percentage voltage drop at common run lengths. NEC recommends 3% maximum for branch circuits and 5% for combined feeder plus branch.

Distance	14 AWG Co	12 AWG Co
25 ft	0.4%	0.2%
50 ft	0.8%	0.5%
75 ft	1.2%	0.7%
100 ft	1.6%	1.0%
150 ft	2.4%	1.5%
200 ft	3.1%	2.0%

Common products for 14 AWG Copper circuits

🧵Wire Roll14 AWG solid copper, 500ftCheck prices on Amazon (paid link) ⚡15A BreakerStandard pairing for 14 AWGCheck prices on Amazon (paid link) 🔧Wire Strippers14 AWG compatibleCheck prices on Amazon (paid link)

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Detailed ampacity: 14 AWG copper. Wire size lookup: 15A circuit. Calculators: voltage drop · panel load calculator.

Frequently asked questions

What wire size do I need for security camera system?

Use 14 AWG copper or 14 AWG aluminum on a 15A breaker at 120V. This is based on NEC 2023 Table 310.16 ampacity with 110.14(C) termination limits and 125% continuous load sizing per 210.19(A)(1).

Does security camera system require GFCI?

No. GFCI is not required for this application.

Requirements vary by state. NEC edition, licensing, permits, and GFCI rules differ by jurisdiction. Check your state or pick it below for personalized info across WireRef.

Important: For reference only. Not a substitute for a licensed electrician. Electrical work can cause serious injury, death, fire, or property damage if performed incorrectly. Always hire a licensed electrician for electrical work, especially for service upgrades, panel work, and 240V circuits. Values are derived from NFPA 70 (NEC) for educational purposes. Always verify against your locally adopted NEC edition and amendments - local jurisdictions may enforce stricter requirements. WireRef provides reference information only and is not responsible for work performed based on this content. NEC® is a registered trademark of the National Fire Protection Association. Free NEC access via NFPA · OSHA Electrical Safety · Terms of use.

NEC 2023 references verified April 2026