Some supplier provides junction box certified Ex E or Ex ia. I know what Ex E or Ex ia means, in terms of the type of protection they offer for circuitries.
However, I have never seen an actual Ex ia JB before, thus I'm wondering, what is the difference in actual physical construction of these 2 differently certified JBs.
However, I have never seen an actual Ex ia JB before, thus I'm wondering, what is the difference in actual physical construction of these 2 differently certified JBs.
