Thread: Common Ground?
View Single Post
  #8   Spotlight this post!  
Unread 11-02-2008, 07:40
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: 10,795
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: Common Ground?

Quote:
Originally Posted by morpheous115 View Post
I am mounting a couple of sensors and solenoids in a certain area on our robot and was wondering if we were allowed to connect all of our grounds to a few specific wires that led back to the RC?
For example: For a double solenoid I would have two powers and one common ground and for a couple of momentary switches I would have a common ground etc.
-morpheous
Morpheus,
There is no specific rule related to wire returns for solenoids except if you think about the wiring for a single solenoid. That wiring requires a pair of wires from the Spike to the solenoid. (red & black) In the Spike user's manual there is a method for connecting a dual action solenoid using both Spike outputs with a common return for the dual action solenoid only. Since First rules do not require adding breakers to the common side wiring, common electrical practice would dictate returning each solenoid on a separate wire back to the breaker panel that feeds that Spike. This prevents some teams from overloading a single #18 wire with the returns from several devices fed from several 20 amp breakers.
Remember that the breaker capacity specifications are dictated by the wire size not the load.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.