Fittings

[Alwayslearningelec]

Anyone have example of what they'd use for this type of fitting? What is the difference between cast & malleable?

"Fittings for rigid steel conduit shall be of cast or malleable iron, threaded, and be
protected by hot dip galvanizing."


Also do they even make cast iron boxes with KO's( assuming slip holes they mean KO's)?

"Where rigid conduits enter a cast-iron box with slip holes, they shall be furnished
and installed with 2 locknuts and bushings made of malleable iron or steel,
insulated with bakelite molded and locked into the bushings, such as
manufactured similar in design, construction, and performance by OZ/Gedney
Company, A Division of Emerson type HBLG or approved equal."

 

[Hv&Lv]

Compare Electrical Steel Fittings Die Cast Fittings and Malleable Iron Differences

Electrical Fittings Steel vs Malleable Iron and Die Cast Consider the Major Differences in Materials Weak threads are the #1 cause of environmental & mechanical fitting failure. Malleable Iron fittings weigh two to 3 times that of steel fittings & Dimensionally are one and one-half times larger...

amftgs.com

Cast Iron VS Malleable Iron: What's the Difference?

In this post, we will clear up any confusion between malleable iron and cast iron and go through the different materials that fall under the cast iron umbrella. We will explain what sets malleable iron apart and what applications best suit each material.

blog.boshart.com

 

[James L]

Black.gas pipe is malleable, if I'm not mistaken.

I think the idea with the fittings is they must be threaded, not compression (which are steel)

 

[kwired]

Black.gas pipe is malleable, if I'm not mistaken.

I think the idea with the fittings is they must be threaded, not compression (which are steel)

It is specifying fittings for RMC though. Other than unions, hubs, conduit bodies and FS boxes (last two aren't really fittings in the NEC) about only commonly used fittings remaining is couplings, the RMC itself is threaded unless using a compression fitting.

 

[James L]

It is specifying fittings for RMC though. Other than unions, hubs, conduit bodies and FS boxes (last two aren't really fittings in the NEC) about only commonly used fittings remaining is couplings, the RMC itself is threaded unless using a compression fitting.

For sure. And I know a conduit body is not a fitting technically, but that's what I had in mind

 

[tom baker]

Note on your submittal couplings are not HDG.

 

[don_resqcapt19]

For sure. And I know a conduit body is not a fitting technically, but that's what I had in mind

According to the listing standard conduit bodies are fittings and conduit bodies fit the code definition of a fitting.
From the UL Guide Information for "Conduit Fittings (DWTT)"

This category covers metallic and nonmetallic conduit fittings, such as connectors, couplings, conduit bodies, short-radius conduit bodies, expansion fittings, locknuts and sealing (liquid-tight) locknuts for use in the assembly of nonmetallic and metallic wiring systems.

.
The Product Standard is UL 514B, Standard for Safety: Conduit, Tubing, and Cable Fittings. The scope of that standard includes conduit bodies.

 

[James L]

According to the listing standard conduit bodies are fittings and conduit bodies fit the code definition of a fitting.
From the UL Guide Information for "Conduit Fittings (DWTT)"
.
The Product Standard is UL 514B, Standard for Safety: Conduit, Tubing, and Cable Fittings. The scope of that standard includes conduit bodies.

Interesting. Thanks

 

[GregoryStellar]

When buying fittings, I look everywhere for the product standard UL 514B, but I don't always find them! I prefer steel products! Although I often work in cosmetic surgery plastic practice, I like to choose and do home repairs myself!