Since no one has bothered to mention this before the sporting season, here is some brief information.
For enclosed switches the manufacturers literature should describe the mode of operation.
If you have to measure it you need two meters to be sure.
If you can see the wafer mechanism then you can tell by inspection.
Look at my two diagrams.
The one on the left has a narrow tab that can only touch one contact terminal at a time and when the switch is between contact positions it doesn't touch any contact.
This is a break before make type.
The one on the right has a wider tab that touches two contact simultaneously as it is rotated in the in-between position. In the full position it only touches one contact, of course.
For enclosed switches the manufacturers literature should describe the mode of operation.
If you have to measure it you need two meters to be sure.
If you can see the wafer mechanism then you can tell by inspection.
Look at my two diagrams.
The one on the left has a narrow tab that can only touch one contact terminal at a time and when the switch is between contact positions it doesn't touch any contact.
This is a break before make type.
The one on the right has a wider tab that touches two contact simultaneously as it is rotated in the in-between position. In the full position it only touches one contact, of course.
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