Nec article 334 covers which type of cable – NEC Article 334, a crucial component of the National Electrical Code, provides comprehensive guidelines for the safe and efficient use of cables in electrical systems. This article covers a wide range of cable types, their applications, and the specific installation requirements for each type.
Understanding the provisions of NEC Article 334 is essential for ensuring the safety and reliability of electrical installations. This guide will delve into the scope, applicability, and key provisions of NEC Article 334, empowering you with the knowledge to make informed decisions about cable selection and installation.
NEC Article 334: Scope and Applicability
NEC Article 334 provides requirements for the installation and use of nonmetallic-sheathed cables. These cables are used for power distribution and control circuits in commercial, industrial, and residential buildings.
The purpose of NEC Article 334 is to ensure the safe installation and use of nonmetallic-sheathed cables. These cables are typically used in concealed locations, such as inside walls and ceilings. They must be installed in a manner that protects them from damage and prevents the spread of fire.
NEC Article 334 covers the following types of cables:
- Type NM cable
- Type NMC cable
- Type UF cable
- Type USE cable
- Type MC cable
Cable Types Covered by NEC Article 334
| Cable Name | Cable Type | Voltage Rating | Insulation Type | Jacket Type |
|---|---|---|---|---|
| Type NM cable | Nonmetallic-sheathed cable | 600 volts | Thermoplastic | Nylon |
| Type NMC cable | Nonmetallic-sheathed cable with metal conductors | 600 volts | Thermoplastic | Nylon |
| Type UF cable | Underground feeder cable | 600 volts | Cross-linked polyethylene | Polyethylene |
| Type USE cable | Underground service entrance cable | 600 volts | Cross-linked polyethylene | Polyethylene |
| Type MC cable | Metal-clad cable | 600 volts | Thermoplastic | Metal |
Examples of each cable type include:
- Type NM cable: Romex
- Type NMC cable: Southwire NM-B
- Type UF cable: Southwire UF-B
- Type USE cable: Southwire USE-2
- Type MC cable: AFC Cable Systems MC
Installation Requirements for Cables Covered by NEC Article 334
The general installation requirements for cables covered by NEC Article 334 include:
- Cables must be installed in a manner that protects them from damage.
- Cables must be installed in accordance with the manufacturer’s instructions.
- Cables must be securely supported.
- Cables must be protected from moisture.
- Cables must be protected from heat.
The specific installation requirements for each type of cable covered by NEC Article 334 are as follows:
- Type NM cable: Type NM cable must be installed in accordance with the requirements of NEC Article 334.10.
- Type NMC cable: Type NMC cable must be installed in accordance with the requirements of NEC Article 334.12.
- Type UF cable: Type UF cable must be installed in accordance with the requirements of NEC Article 334.14.
- Type USE cable: Type USE cable must be installed in accordance with the requirements of NEC Article 334.16.
- Type MC cable: Type MC cable must be installed in accordance with the requirements of NEC Article 334.20.
NEC Article 334 and Electrical Safety
NEC Article 334 helps to ensure electrical safety by providing requirements for the installation and use of nonmetallic-sheathed cables. These cables are used for power distribution and control circuits in commercial, industrial, and residential buildings.
It is important to use the correct type of cable for the intended application. Using the wrong type of cable can lead to electrical hazards, such as fires and shocks.
Improper cable installation can also lead to electrical hazards. For example, if a cable is not properly supported, it could fall and come into contact with a live wire. This could cause a fire or shock.
Answers to Common Questions: Nec Article 334 Covers Which Type Of Cable
What is the purpose of NEC Article 334?
NEC Article 334 establishes the minimum requirements for the installation and use of cables in electrical systems to ensure safety and reliability.
What types of cables are covered by NEC Article 334?
NEC Article 334 covers a wide range of cable types, including power cables, control cables, and communication cables, with varying voltage ratings, insulation types, and jacket materials.
How does NEC Article 334 help to ensure electrical safety?
NEC Article 334 provides specific guidelines for the selection, installation, and protection of cables, reducing the risk of electrical hazards such as short circuits, overloads, and ground faults.
