Wood Mill wiring methods

A

AC\DC

Senior Member
Location
Florence,Oregon,Lane
Occupation
EC
What would you use for a wood mill, The currently all have ridged- couple EMT runs. My runs going to be completely out of the way for any damage. Was thinking to just use MC so it's cheaper but what would you do.
Its just feeding wood shredder at 80 amps- 460volt- 3/0

competing with another ec so trying to knock price down as much as possible. and piping will be a lot more.
Or just pipe it so it looks better.
 
CoolWill said:
IMG_5441.jpeg2-3 aluminum conductor MC is available online for $3.16/ft. Is the 80 amps the machine rating or the circuit rating?
Click to expand...
I’ll have to look at alum- coppers 8 a foot
Machines 55 A but the manual says is 80 amps. To the control box. It had an internal breaker of 65 A but I don’t know why they want 80 ,whatever.
 
AC\DC said:
???? Most around here only do commercial and residential—- I love industrial but I have none were I currently live


Sucks hard to underbid house monkeys
Click to expand...
I just went on a job yesterday where the grain auger had quit working. New customer, less than five miles from the house. They said they had been using a company 50 miles away because they couldn’t find anybody local that could work on three phase. They heard about me, and even came to the house looking for me. B phase on the starter was burnt. I was surprised they actually ran rigid everywhere.
 
Is anything there considered a Class 2 or 3 hazardous location? That might be why everything is RMC, and the couple EMT runs were non compliant add ons some time later?
 
AC\DC said:
I don't think so.only thing would be dust. It's all on a vacume system outdoors under an massive eve
Click to expand...
Those conditions likely do not trigger any classified locations then. Insurance company likely would still get to make a call on this if they wish.
 
AC\DC said:
Calling to see about a current limiting circuit breaker m
Click to expand...
These OCPD, both breakers and fuses, do not always reduce the fault current enough to protect other equipment. For example, if 100kA is available current limiting devices might begin to open at 15kA and they finish opening in less than 1/4 cycle.
This sounds good but is that enough to protect a device that is rated 5kA? Nobody knows unless they have tested the 5kA equipment with current limiting devices upstream.
 
Last edited:
There donung an ark flash study and will find all AIC ratings to each panel… though I don’t know when.
I could do a rough one to just my location for a rough idea what I’ll have, but I don’t know how to sacking for motor contributions.
 
You must log in or register to reply here.
Top