Industrial Electrical Wiring Color Codes

Us ac the us national electrical code only mandates white or grey for the neutral power conductor and bare copper green or green with yellow stripe for the protective ground in principle any other colors except these may be used for the power conductors.

Industrial electrical wiring color codes. Quoting from authoritative codes standards for each region we provide a table summarizing the current and prior wiring color code conventions used by electricians in building wiring. The standards used will vary based on what country the wiring is being done in and the type electricity it is for and other factors. From an electrical standpoint industrial machine equipment and tools from drill presses to multi motored automatic machines. Black red and blue are used for 208 vac three phase.

The nfpa family of codes and standards that deal with electrical issues are as dynamic as the subjects they address including nfpa 70 national electrical code nec nfpa 70b recommended practice for electrical equipment maintenance and nfpa 70e standard for electrical safety in the workplace these extensive documents reflect changing industry. The color code practice is very similar to that of the us because of the harmonization effect. Wiring color code standards are set in place by the canadian electric code or cec in canada. The old color code in uk until 2004 is shown below.

The color of the sheathing indicates recommended usages. Non metallic or nm 120 volt and 240 volt electrical cable come in two main parts. Phase 1 red phase 2 black phase 3 blue neutral white ground green with yellow stripe. The canadian electric code governs the electrical wiring color code for canada.

Because every type of machine has unique requirements for wiring methods operator safety depends on your understanding the differences between rules in the nec and methods outlined in nfpa 79 every type of machine has unique requirements when it comes to operator safety. The color code is very similar to the u s a s color code. Electrical wiring color code guide. Before that it had its own code for electrical wiring.

Wiring is subject to safety standards for design and installation. This article describes the electrical wiring color code conventions for 120v or 240v ac circuit wiring in buildings in canada the u s the u k. Allowable wire and cable types and sizes are specified according to the circuit operating voltage and electric current capability with further restrictions on the. The outer plastic sheathing or jacket and the inner color coded wires the sheathing binds the inner wires together and its outer markings indicate the number of wires and size of wire gauge within the sheathing.

Electrical wiring is an electrical installation of cabling and associated devices such as switches distribution boards sockets and light fittings in a structure. Types of wire color codes there are quite a few different wire color code standards in place so it is important to understand which one to follow in which situation. Brown orange and. The colors adopted as local practice are shown in table below.