NFC-50/100 - ECC-50/100 - speaker stopping for a seconds then started again
just got done installing a NFC-50/100 panel
two speaker circuits would work fine for a minute or two then cut off for a few seconds.
thought it was it much wattage, used an impedance meter. all the circuits were 4 to 6 watts, it was not the problem.
problem was speaker and strobe circuits got flipped.