Dear John,
What is the test method to perform decay on conductive vinyl tiles?
There currently is no test method for decay on conductive tiles. The requirement is for the tile to have a connection to ground of less than 1xE9 ohms. Decay does not have any meaning at that resistance level. If this is part of a footwear/flooring system, then the total system resistance and the body voltage from the walking test must be done.
Those two tests are the only qualificaiton requirements.