Do I Need an Electrician to Install Ethernet?

If you are planning to run Ethernet cable through your home or office, you may be wondering whether the job requires a licensed electrician. After all, the work involves drilling through walls, running cable through ceilings, and installing wall plates, much like electrical wiring.

The short answer is usually no. Ethernet is low-voltage communications cabling, and it is commonly installed by network cabling contractors rather than electricians. For businesses in the South Bay, a Network Cabling Company Torrance, CA offices trust is often the best choice, since cabling specialists focus on data performance, testing, and documentation.

This guide explains when an electrician is and is not needed, what California licensing rules say, which building code basics apply, and how to choose the right installer for your project.

Table of Contents

• Why Ethernet Is Different From Electrical Wiring
• Do I Need an Electrician to Install Ethernet? The Short Answer
• When You Might Need an Electrician
• California Licensing Rules for Ethernet Installation
• Code Requirements That Still Apply
• Electrician vs. Network Cabling Contractor
• Can You Install Ethernet Yourself?
• Hiring an Ethernet Installer in Torrance
• Conclusion
• Frequently Asked Questions

Why Ethernet Is Different From Electrical Wiring

Electrical wiring carries 120 or 240 volts of alternating current to outlets, lights, and appliances. Mistakes can cause shock, fire, or serious injury, which is why electrical work is tightly regulated and typically performed by licensed electricians.

Ethernet cable carries low-voltage data signals between devices. Even when it delivers Power over Ethernet (PoE) to cameras, phones, and wireless access points, the power level is limited by the IEEE 802.3 standards, with the highest current standard, IEEE 802.3bt, allowing up to 90 watts at the switch port. Because the voltage and power are much lower, the National Electrical Code (NEC) treats communications cabling differently from power wiring.

That difference is why Ethernet installation is usually handled by low-voltage or network cabling contractors, who specialize in data performance rather than power distribution.

Do I Need an Electrician to Install Ethernet? The Short Answer

In most cases, you do not need an electrician to install Ethernet cable. Homeowners can generally run Ethernet on their own property, and businesses typically hire network cabling or low-voltage contractors for the work.

That said, the person you hire still matters. In California, anyone performing cabling work for others above a certain value must hold the right contractor’s license, and the installation must follow applicable building and fire codes. An electrician is one option, but a dedicated cabling contractor is often the better fit for data projects.

When You Might Need an Electrician

Although Ethernet itself does not require an electrician, some related work does:

• New power outlets: Installing outlets for a network rack, switches, or equipment closet requires electrical work.
• Dedicated circuits: Server rooms and larger network racks may need dedicated circuits or additional capacity.
• Combined construction projects: During remodels and new construction, electricians often install power while cabling contractors handle data at the same time.
• Changes to electrical boxes: Modifying existing electrical boxes or panels is electrical work and should be done by a licensed electrician.

Keep in mind that devices powered through PoE, such as Wi-Fi access points and IP cameras, do not need a separate electrical outlet at the device. The power comes through the Ethernet cable from a PoE switch or injector.

California Licensing Rules for Ethernet Installation

In California, contractors are licensed by the Contractors State License Board (CSLB). Two license classifications commonly cover Ethernet and network cabling work:

• C-7 Low Voltage Systems: Covers low-voltage communication systems, including voice and data cabling.
• C-10 Electrical: Covers electrical work and also allows low-voltage installation.

California generally requires a license for construction work where the combined cost of labor and materials meets the minor work threshold, which was raised from $500 to $1,000 beginning in 2025. Always confirm current rules on the CSLB website.

The state also runs an electrician certification program through the Department of Industrial Relations, which includes a Voltage Data Signal Technician category for workers who install low-voltage systems. You can verify any contractor’s license, bond, and workers’ compensation coverage using the free CSLB license lookup.

Code Requirements That Still Apply

Even though Ethernet is low voltage, it must still be installed safely and according to code.

• Separation from power: Communications cable should be kept apart from electrical wiring. It should not share the same box or conduit as power conductors unless a proper barrier is used, and it should cross power cables at right angles where possible.
• Jacket ratings: Plenum-rated (CMP) cable is typically required in air-handling spaces, riser-rated (CMR) cable is used in vertical runs between floors, and outdoor-rated cable is used outside.
• Firestopping: Holes through fire-rated walls, floors, and ceilings must be properly sealed to maintain fire protection.
• Support: Cable should be supported by approved hardware, not laid directly on ceiling tiles or attached to other building systems.
• Abandoned cable: The NEC generally requires accessible portions of abandoned communications cable to be removed.

Industry standards such as ANSI/TIA-568 for cabling performance and ANSI/TIA-569 for pathways and spaces provide additional guidance for professional installations.

Electrician vs. Network Cabling Contractor

Both electricians and network cabling contractors can install Ethernet, but they bring different strengths.

Factor	Electrician	Network Cabling Contractor
Primary focus	Power wiring, outlets, circuits, and lighting	Data, voice, fiber, Wi-Fi, camera, and access control cabling
Common California license	C-10 Electrical	C-7 Low Voltage Systems (some also hold C-10)
Ethernet expertise	Varies by company	Core specialty
Certification testing	Not always provided	Typically standard, with test reports
Patch panels and racks	Sometimes	Typically standard
Best for	New outlets, circuits, and combined power and data projects	Most Ethernet, structured cabling, and network projects

Can You Install Ethernet Yourself?

Homeowners can usually install Ethernet cable on their own property. Simple runs, such as through an unfinished basement or along baseboards, are manageable for many people with basic tools.

In-wall installations are more challenging. Fishing cable through finished walls, drilling through framing and fire blocks, terminating jacks correctly, and avoiding electrical wiring all require skill and patience. Without a cable tester, it can also be difficult to confirm that each run performs at full speed.

For businesses, rental properties, and larger homes, professional installation is recommended. A qualified installer uses the correct cable ratings, protects walls and finishes, tests every run, and provides documentation for future changes.

Hiring an Ethernet Installer in Torrance

Torrance includes a wide range of properties, from homes and apartments to offices along Hawthorne Boulevard, retail spaces near Del Amo Fashion Center, and warehouses near Torrance Municipal Airport. For most of these projects, a licensed network cabling company is the most direct choice, with an electrician brought in only when new power outlets or circuits are needed. Once you know who to hire, the next step is budgeting, and many property owners ask, How much does network cabling cost? Requesting on-site quotes from two or three licensed contractors, and comparing drop counts, cable type, testing, and warranty, will help you plan accurately. If your project is part of a remodel or tenant improvement, check with the City of Torrance or your general contractor about any permit requirements.

Conclusion

You usually do not need an electrician to install Ethernet. Ethernet is low-voltage communications cabling, and it is commonly installed by licensed C-7 low-voltage or network cabling contractors, while electricians are needed for related power work such as new outlets or dedicated circuits. Whoever performs the work should follow code requirements for separation, jacket ratings, firestopping, and cable support, and should test every run. As you plan your cable routes and outlet locations, it also helps to understand distance limits, which leads to another common question: How long can an Ethernet cable be without loss?