AnswerID: 288125 Submitted: Monday, Feb 18, 2008 at 11:27
Member - Mike DID
Where there are two ways of doing something, there will be two "standards" e.g. which side of the road to drive on - unless there is a body to publish a firm standard.
That never happened for the T plug.
Fortunately the other moderrn DC connectors don't have that problem -
- Cigarette Lighter - centre always positive
- Merrit Socket - centre always positive
50 and 175 amp Anderson
SB - polarity s marked on the connector.
- Red/Black 30 amp Anderson
Powerpole - red is positive.
The T connector is falling out of favour, not just because of the problem of reverse polarity damage, so you would be better off changing to one of the more modern standard connectors.
Reply 8 of 16