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Old 11-01-2009, 07:11 AM
Bushcaddy Bushcaddy is offline
Join Date: Jul 2008
Location: Plymouth, MA
Posts: 133
Default Confirming P Lead wiring to Mag Toggle

I'm using separate toggle switches for my two Slick mags. The switch being used is a Honeywell Locking Toggle, model 2TL1-3D, DPDT, On-On. What I'm somewhat unclear on is where the P Lead gets attached. If the down position is off and up position is on, which one of these gets the P lead connection from the mag? In other words does the mag need the ground in the on position to run or does having the ground attached to the off position kill the power to the mag? Thanks...
Plymouth, MA
Varga 2180; N2C
2013 Donation Made

Last edited by Bushcaddy : 11-01-2009 at 07:12 AM. Reason: typo
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Old 11-01-2009, 07:17 AM
Mel's Avatar
Mel Mel is offline
Join Date: Mar 2005
Location: Dallas area
Posts: 9,776

The mag is "HOT" when the "P" lead is open, i.e. switch "OFF". Turn the switch on to ground and "kill" the mag.

Typically a SPST switch is installed upside-down so that the mag is "HOT" with the switch in the up position.
Mel Asberry..DAR since last century
A&P/EAA Tech Counselor/Flight Advisor
Specializing in Amateur-Built and Light-Sport Aircraft
North Texas (8TA5)
RV-6 Flying since 1993, 172hp O-320, 3-Blade Catto (since 2003)
Legend Cub purchased 12/2017
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