Thread: Wire color...
View Single Post
  #10   Spotlight this post!  
Unread 08-03-2010, 14:48
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,770
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: Wire color...

Whoa Tex,
I didn't say I would make the team remove it. I said I agreed with the assessment that green is a color used for safety ground. As such I would inform the team of my assessment and let them decide. Inspectors do have a responsibility to try and help teams. We are on the front line to help you be competitive because it is best for all involved. As green is often thought of as being a common/earth/ground/safety, an electrical person would walk up to help you troubleshoot and naturally think that the green is tied to battery common. If used in the output of a speed controller, that could allow a person to tie a meter or other electrical device to it thinking it was common and find a pulsed 12 volt signal there. Smoke may follow. In auto electrical, as Joe has pointed out, there are other color codes.
As always, teams have the right to question the inspector and ask the LRI for a ruling. An LRI will usually include the head ref and FTA in discussions that transcend the rules. As much as we try to help, teams often disregard our advice. A testament to this is teams who mount the breaker panel upside down and have breakers fall out or teams that attach chain sprockets directly to the shafts of CIM motors without the use of additional bearing surfaces and have the motors fail during a finals match. The list is long, these are just a few.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.

Last edited by Al Skierkiewicz : 10-03-2010 at 09:01.