The test for ignition protection by whatever variety of features* is very specific. The simple overview is a spark producing device is submitted for testing, the testing agency operates it in a propane filled chamber. BOOM = fail.
*There are different methods of achieving ignition protection. Using alternators as an example, the Delco base alternator typically has a screened back as one of its features whereas the Motorola has a sealed chamber capped by the piggybacked regulator and no screen at all.
edit: Ignition protection is distinctly different from explosion proof. The latter is a designation in the National Electrical Code under a number of classifications required for refineries, fueling stations, grain silos and in certain jurisdictions, woodworking shops.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Last edited by ndutton; 01-09-2020 at 08:52 AM.
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