480v temp services

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Alwayslearningelec

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Do 480v temp services or anything run, heaters etc at 480v have to be in a metal raceway and not run in romex etc.? I am looking in 590.4 and don't see this. Thanks.
 
Temp service equipment according to 590.4 (A) needs to be installed according to art 230 like it would in other instances.

Branch circuits see 590.4(C), are permitted in raceways, cables or cords - this includes NM cables, even in places they are not otherwise allowed.
 
kwired said:
Temp service equipment according to 590.4 (A) needs to be installed according to art 230 like it would in other instances.

Branch circuits see 590.4(C), are permitted in raceways, cables or cords - this includes NM cables, even in places they are not otherwise allowed.
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So a 480v temp feed to a feeder could be cord? If so then it might be a NYC code that it has to be in metal jacket/raceway. Thanks.
 
I can not tell you what any local codes may be but NEC will allow use of cords. May be a good idea to provide some physical protection or route it where it is protected depending on what likely physical abuse it may be subject to.
 
Seems to be nothing anywhere stating 480v to be run in metal raceway or that NM cord/cable can't be used. Someone told me that it had to be hence my question. THanks
 
Doesn't look like the amendment is an issue

ARTICLE 590


Temporary Installations


SECTION 590.4


Subsection 590.4(J) ? Add the following at the beginning of the subsection:


Temporary wiring for lighting shall be properly and substantially supported on noncombustible, nonabsorbtive insulators and shall be kept off the floor and free and clear of contact with woodwork, metal pipes and metal portions of the building structure.


Subsection 590.4(K) ? Add a new subsection 590.4(K) to read as follows:


(K) Permanent Feeders and Branch Circuits used for Temporary Light and Power. Permanent feeders may be used for temporary light, heat or power service if run in approved raceways or conduits from the source of supply directly to the distribution center. Temporary polarized lampholders may be connected to permanent branch circuit wiring pending the erection of the permanent fixtures.


Subsection 590.4(L) ? Add a new subsection 590.4(L) to read as follows:


(L) Grounding. All portable machines shall be grounded. All grounding shall conform with Article 250.


SECTION 590.6


Section 590.6 ? Add an Exception after the first paragraph, to read as follows:


Exception: Temporary wiring installations that are accessible to the public and used to supply temporary power for illumination of outdoor areas during construction, remodeling, maintenance, repair, or demolition of buildings, structures, equipment, or similar activities shall comply with all other requirements of this code for permanent wiring and shall be provided with ground-fault protection for personnel.


SECTION 590.8


Section 590.8 ? Add a new section 590.8 to read as follows:


590.8 Sidewalk Shed Lighting. All sidewalk shed lighting installations shall comply with the following conditions in addition to all other relevant provisions of this code:


(1) Such lighting shall be installed in a metal raceway approved for outdoor use.


(2) All junction boxes shall be suitable for damp or wet locations.


(3) A minimum wire size of 12 AWG shall be used for the installation.


(4) All fixtures shall be suitable for outdoor locations.


(5) Ground-Fault Circuit Interrupter (GFCI) protection is required on receptacles and lighting.


(6) The installation shall be properly grounded and bonded.


(7) The panel supplying power to the sidewalk shed lighting shall have a directory that clearly indicates which circuit is being used to supply power.
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