Hard Useage vs Extra Hard Useage Applications

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Daniel_Mack

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Trying to nail down the definition / application definitions of Hard vs Extra Hard Use is like searching for the Holy Grail. LOL Can anyone direct me to a source that clearly defines the differences and environmental applications of these two classes of conductor application. TIA!
 
Daniel_Mack said:
Trying to nail down the definition / application definitions of Hard vs Extra Hard Use is like searching for the Holy Grail. LOL Can anyone direct me to a source that clearly defines the differences and environmental applications of these two classes of conductor application. TIA!
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There is no NEC definition. Articles will dictate Hard or Extra Hard Usage cable. Table 400.4 lists types of cable that conform to these usages.
 
NEC table is made on basis that the specification for application (usage) was already defined by the engineer.

Who defined the spec in your case? If nobody then you have to gather some general info and from that draw a hypothesis as to what "usage" should be spec'd, then use the NEC table. The table simply maps "usage" to cord types, etc.

Next question is, are you doing 4,000ft or 25ft of cord? If just a few feet then price should be of little concern, w/o trying to figure out which one you can just choose the heavy 600v cord.

I have 600v extension cord for a 240v welding machine, i find it to be a pita because it's heavy, but, it moves around a lot, things land on it, it takes some abuse, etc etc.
 
“Hard Service” cord means the jacket is at least 30 mils thick, “Extra Hard Service” cord means the jacket is at least 60 mild thick. Everything else is up to the manufacturer and how you chose to use it is pretty much up to you. But there are applications, such as theatrical use, where you must use Extra Hard, you can’t use anything less.
 
Jraef said:
But there are applications, such as theatrical use, where you must use Extra Hard, you can’t use anything less.
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Absolutely true, and necessary. The gentle ministrations of the average stagehand have elevated destruction to an art form.



SceneryDriver
 
SceneryDriver said:
Absolutely true, and necessary. The gentle ministrations of the average stagehand have elevated destruction to an art form.
SceneryDriver
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Eons ago I did work for a company in the Bay Area that made stage equipment for the Jefferson Starship and the Grateful Dead bands. What I worked on were the "baloney" cables that connected everything; SO cord with up to 52 conductors using MIL spec crush-proof multi-pin connector bodies from a company called Pyle National. These connectors were designed to be used in battlefields and warships, yet somehow, the Roadies would manage to destroy them on a regular basis... Good times :roll:
 
Jraef said:
Eons ago I did work for a company in the Bay Area that made stage equipment for the Jefferson Starship and the Grateful Dead bands. What I worked on were the "baloney" cables that connected everything; SO cord with up to 52 conductors using MIL spec crush-proof multi-pin connector bodies from a company called Pyle National. These connectors were designed to be used in battlefields and warships, yet somehow, the Roadies would manage to destroy them on a regular basis... Good times :roll:
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Yep - it’s amazing what a person can do with the help of chemistry.
 
Jraef said:
From my observation they were paid minimum wage plus all the weed they could smoke, and they took that as a challenge...
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Mine was just a comment on the fact that most entertainment production work involves considerable time off the clock but still needing to be available. Add all those hours to your time, and you earn more hourly flipping burgers at McD's.

The 420 made it bearable, so I'm told.
 
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