What is 240.5 B?
What size wire is used for whips?
Where is the fixture wire located?
What is 410.117 C?
What is 410.62?
What is the assumption that the current in a load is only the current of that load?
What is the wire number for remote ballast?
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About this website
Can fixture wires be used for branch circuit wiring?
Fixture wire shall be permitted to be tapped to the branch-circuit conductor of a branch circuit in accordance with the following: 15- or 20-ampere circuits — 18 AWG, up to 15 m (50 ft) of run length. 15- or 20-ampere circuits — 16 AWG, up to 30 m (100 ft) of run length. 20-ampere circuits — 14 AWG and larger.
What does OSHA consider temporary wiring?
Temporary electrical installations of more than 600 volts may be used only during periods of tests, experiments, emergencies, or construction-like activities.
Can so cord be used as permanent wiring?
National Electrical Code (NEC) does not allow extension cords in lieu of permanent wiring (NEC 400.8(1) – 2014 Version). General rule– if equipment is powered from an extension cord for more than 30 days, permanent solutions should be installed.
What can flexible cords be used for?
Flexible cords are used to connect electrical equipment to a power source....Use flexible cords only for:Pendants.Wiring fixtures.Connecting portable lamps and appliances.Connecting portable signs.Elevator cables.Wiring cranes and hoists.Connecting fixed equipment.Preventing noise or vibration.More items...•
What is the most common OSHA electrical violation?
The most frequently violated standard is the failure to prevent the release of hazardous energy while employees perform servicing and maintenance activities.
Is surface wiring legal?
It is important to realize that surface wiring is only an acceptable practice indoors, and poses many safety concerns when implemented outside.
What is considered permanent wiring?
Any cords in place over 90 days are considered permanent wiring. Unfortunately, once in place, extension cords tend to become permanent wiring and a fire hazard.
Are extension cords against fire code?
Extension cords and flexible cords shall not be affixed to structures, extended through walls, ceilings or floors, or under doors or floor coverings, nor shall such cords be subject to environmental damage or physical impact.
What is a fixture wire?
Fixture wires are flexible conductors used for wiring fixtures and control circuits, but not branch circuits. There are some special uses and requirements for fixture wires, and NEC Art. 402 deals especially with fixture wires. Some key points: No fixture wire can be smaller than 18 AWG [402.6].
Can flexible cords be used as temporary wiring?
In other words, flexible cords when used in temporary wiring may be run through doorways, windows, or similar openings provided they are protected from damage, but cannot be used as a substitute for the fixed wiring of a structure; run through holes in walls, ceilings, or floors; attached to building surfaces; or ...
What is the difference between a flexible cable and a flexible cord?
Difference between flexible cable and cord Flexing cord is designed for a specific number of flex life cycles over an application's runtime. Flexible cable is any cable that is flexible and easy to bend.
What's the difference between a cord and a cable?
With regard to electrical cables vs cords, the tendency is to use "cord" for a collection of insulated wires intended to be handled frequently (as a lamp cord or the cord for your earphones), and to use "cable" for a relatively fixed connection (as the wires in your walls or the cable connecting your TV to "cable").
What is considered temporary wiring?
Temporary wiring often includes all the elements of permanent wiring systems such as the service, feeders, branch circuit wiring for power and lighting outlets.
What can you use for temporary electrical needs?
Electricians sometimes use indoor rated cable for temporary since it is less expensive than cable rated for outdoor use.
Which wiring is used for temporary wiring?
Cleat wiringCleat wiring: This system of wiring comprises ordinary VIR or PVC insulated wires braided and compounded held on walls or ceilings by means of porcelain cleats, plastic, or wood. Cleat wiring is a temporary wiring system, not suitable for domestic premises.
What is a temporary electrical installation?
What is a temporary electrical system? Although BS 7671 is concerned with 'electrical installations' it calls any assembly of electrical equipment an 'installation', whether temporary or permanent. If it is temporary, it is designed for a particular purpose and will be removed when no longer required for that purpose.
Where is the fixture wire located?
Fixture Wire is the wire that is located on the inside of light fixtures. The Branch Circuit wiring is the wiring from the breaker to the outlet box.
What size wire is used for whips?
The wording in 240.5 (B) (2) says those sizes are fixture wire. When you buy a pre-made whip with conductors smaller than 14, they are always made up using fixture wire.
What is the assumption that the current in a load is only the current of that load?
The wire in a load that only connects to a branch circuit only has to carry the current to that particular load. Somewhat the assumption is that the current in the load is only the current of that load, and over normal current is not expected in the individual load. Under some sort of shorting conditions the current in the individual load could be higher than its normal current and might overheat the insulation of the smaller wire. But this is tolerated by the way the code is written. Extension cords are an example of a possible problem, and overloaded extension cords have caused fires.
What is the wire number for remote ballast?
Wire from remote ballast can be #14, #16 depending on distance.#N#It's considered part of the fixture. Or was code could have changed from the last time I did any work.
Can a tap wire be a fixture wire?
It can be fixture wire it can be branch circuit wire. An allowable tap conductor here doesn't have to be "fixture wire" either.
Is the sensor part of the branch circuit?
The reference is that the inspector is correct. The sensor is part of the branch circuit not part of the fixture wiring so it must be 12 awg, IMO [MENTION=160324]D_Norris MENTION]
Can you feed a single fixture?
Yes, you are permitted to do that, as long as it feeds a single fixture.
402.1 Scope
This article covers general requirements and construction specifications for fixture wires.
402.3 Types
Fixture wires shall be of a type listed in Table 402.3, and they shall comply with all requirements of that table. The fixture wires listed in Table 402.3 are all suitable for service at 600 volts, nominal, unless otherwise specified.
402.7 Number of Conductors in Conduit or Tubing
The number of fixture wires permitted in a single conduit or tubing shall not exceed the percentage fill specified in Table 1, Chapter 9.
402.8 Grounded Conductor Identification
Fixture wires that are intended to be used as grounded conductors shall be identified by one or more continuous white stripes on other than green insulation or by the means described in 400.22 (A) through (E).
402.10 Uses Permitted
Fixture wires shall be permitted (1) for installation in luminaires and in similar equipment where enclosed or protected and not subject to bending or twisting in use, or (2) for connecting luminaires to the branch-circuit conductors supplying the luminaires.
402.12 Uses Not Permitted
Fixture wires shall not be used as branch-circuit conductors except as permitted elsewhere in this Code.
402.14 Overcurrent Protection
Overcurrent protection for fixture wires shall be as specified in 240.5.
How many conductors does an AC cable have?
a. AC cable has a maximum of four conductors; MC has a maximum of six
What is the size of AC cable?
d. AC cable is sized from 10 AWG to 4/0; MC is sized from 18 AWG to 2,000 kcmil
Where do branch circuits originate?
Branch circuits shall originate in a power outlet or panelboard. Conductors shall be run as multiconductor cord or cable assemblies or open conductors, or shall be run in raceways. All conductors shall be protected by overcurrent devices at their ampacity. Runs of open conductors shall be located where the conductors will not be subject to physical damage, and the conductors shall be fastened at intervals not exceeding 10 feet (3.05 m). No branch-circuit conductors shall be laid on the floor. Each branch circuit that supplies receptacles or fixed equipment shall contain a separate equipment grounding conductor if the branch circuit is run as open conductors.
How far should conductors be fastened?
Runs of open conductors shall be located where the conductors will not be subject to physical damage, and the conductors shall be fastened at intervals not exceeding 10 feet (3.05 m). No branch-circuit conductors shall be laid on the floor.
Why do we need a disconnecting switch?
Disconnecting switches or plug connectors shall be installed to permit the disconnection of all ungrounded conductors of each temporary circuit.
How far apart can a conductor be run?
The conductors shall be run as multiconductor cord or cable assemblies or within raceways; or, where not subject to physical damage, they may be run as open conductors on insulators not more than 10 feet (3.05 m) apart. 1926.405 (a) (2) (ii) (B) Branch circuits shall originate in a power outlet or panelboard.
What voltage is used for portable lighting?
However, 120-volt lights may be used if protected by a ground-fault circuit interrupter.
What type of cord is used for portable electric tools?
Extension cord sets used with portable electric tools and appliances shall be of three-wire type and shall be designed for hard or extra-hard usage. Flexible cords used with temporary and portable lights shall be designed for hard or extra-hard usage.
Where are switchboards located?
Switchboards and panelboards. Switchboards that have any exposed live parts shall be located in permanently dry locations and accessible only to qualified persons. Panelboards shall be mounted in cabinets, cutout boxes, or enclosures designed for the purpose and shall be dead front. However, panelboards other than the dead front externally-operable type are permitted where accessible only to qualified persons. Exposed blades of knife switches shall be dead when open.
What is 240.5 B?
And 240.5 (B) (2) requires the use of fixture wire. Building wire of the same size is not permitted for that application. The only permitted wire types for that application are found in Table 402.3.
What size wire is used for whips?
The wording in 240.5 (B) (2) says those sizes are fixture wire. When you buy a pre-made whip with conductors smaller than 14, they are always made up using fixture wire.
Where is the fixture wire located?
Fixture Wire is the wire that is located on the inside of light fixtures. The Branch Circuit wiring is the wiring from the breaker to the outlet box.
What is 410.117 C?
410.117 (C) allows any conductor type with suitable temp rating for the application to be used as a fixture tap, though that section applies to flush and recessed luminaires.
What is 410.62?
410.62 (cord connected luminaires)also allows, with conditions, the use of smaller conductors than the branch circuit conductors.
What is the assumption that the current in a load is only the current of that load?
The wire in a load that only connects to a branch circuit only has to carry the current to that particular load. Somewhat the assumption is that the current in the load is only the current of that load, and over normal current is not expected in the individual load. Under some sort of shorting conditions the current in the individual load could be higher than its normal current and might overheat the insulation of the smaller wire. But this is tolerated by the way the code is written. Extension cords are an example of a possible problem, and overloaded extension cords have caused fires.
What is the wire number for remote ballast?
Wire from remote ballast can be #14, #16 depending on distance.#N#It's considered part of the fixture. Or was code could have changed from the last time I did any work.