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What is EMT? #26333
06/06/03 11:58 PM
06/06/03 11:58 PM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Sorry about this string of silly questions,
but what is EMT? as a wiring system.
Is it like Mineral Insulated Metal Sheathed cable?.
Could someone please help?. [Linked Image]
TIA

Work Gear for Electricians and the Trades
Re: What is EMT? #26334
06/07/03 12:15 AM
06/07/03 12:15 AM
T
txsparky  Offline
Member
Joined: May 2001
Posts: 552
Magnolia,.Texas U.S.A.
The only truly silly question is one that goes unasked. [Linked Image]
EMT is short for Electrical Metallic Tubing
The NEC definition is......
Quote
An unthreaded thin-wall raceway of circular cross section designed for the physical protection and routing of conductors and cables and for use as an equipment grounding conductor when installed utilizing appropriate fittings.EMT is generallymade of steel (ferrous) with protective coatings or aluminum (nonferrous).

It is available in 1/2" through 4"trade size and available in 10 foot lengths.

Donnie

[This message has been edited by txsparky (edited 06-07-2003).]


Donnie
Re: What is EMT? #26335
06/07/03 03:29 AM
06/07/03 03:29 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Txsparky,
So EMT is a steel(metallic) conduit wiring system.
What sort of wire is normally pulled trough these conduits?.
Thanks for your advice Donnie!. [Linked Image]

Re: What is EMT? #26336
06/07/03 05:53 AM
06/07/03 05:53 AM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,344
thhn, thwn, etc etc....

Re: What is EMT? #26337
06/07/03 06:06 AM
06/07/03 06:06 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Hey Sparky,
I don't wan't to sound dis-respective or anything, but I don't know what you mean with respect to thhn and twhn wires.
We don't use these sorts of wire designations over here in NZ. [Linked Image]

Re: What is EMT? #26338
06/07/03 07:12 AM
06/07/03 07:12 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
[Linked Image]

THHN Heat-resistant thermoplastic

THWN Moisture- and heat-resistant thermoplastic


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: What is EMT? #26339
06/07/03 09:07 AM
06/07/03 09:07 AM
R
russ m  Offline
Member
Joined: Feb 2003
Posts: 169
Burbank,IL,USA
Emt is used as a raceway, the same as Rigid and Intermediate conduit. The biggest differences are the EMT is to thin to be threaded and it is not as durable in corrosive areas. Emt is mainly used indoors, but is also used outdoors above grade.

Russ

http://www.alliedtube.com/html/mechdiv.html
http://www.wheatland.com/wtchp.htm

[This message has been edited by russ m (edited 06-07-2003).]

Re: What is EMT? #26340
06/07/03 09:35 AM
06/07/03 09:35 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
[Linked Image]

EMT

[This message has been edited by iwire (edited 06-07-2003).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts

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