13 Simple 10 Gauge Wire 40, Breaker Pictures
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Siemens 40, Double-Pole Type QP Circuit Breaker - The setup is working because each breaker pair feeds off the proper panel bus leg (one attaches to l1, the other to l2). From your introduced records, each 240v circuit is split throughout the 2 breakers to do this. Especially, there are two murray mh-t 30-amp breakers. Those are tandem breakers and no longer "slimline" or "thin" breakers -- the 2 breaker switches on each aren't linked in any way. One of these breakers is used for the garments dryer and the other for an electric water heater.
I ran across a panel these days that has a water heater and a dryer mounted using tandem breakers. They may be no longer split either. This panel is configurable to half a slot, that means a regular 110vac breaker would be clipped into 2 prongs of a stay bus, and there's a small plastic wall separating the b side from the a aspect keeping you from shorting the two 110vac circuits collectively. However, the tandem breakers have a slot cut out allowing you to plug into each aspects. Every side of the tandem breaker gets its own feed from its personal prong at the buses making 220vac. The simplest trouble is connecting the 2 transfer handles. Glaringly a nail or piece of wire will paintings but it appears shoddy. There definitely is a real product for this, known as a circuit breaker manage tie. I just bought some myself at the neighborhood huge orange home development save to replace a chunk of cord stuck via one among mine.
What is incorrect -- the most important safety issue here is that with a circuit fault, best one of the breakers within the set may additionally journey, leaving the 240v circuit partly energized. As an instance if the dryer heating coil burns through and one cease touches ground, that facet will trip, leaving the alternative leg warm. You simply want a circuit fault to definitely electricity down each legs. This seems all sorts of wrong, even though. It is still a single pole breaker, even supposing there are 120v circuits coming off it. It looks like if this was okay, that i would pay attention approximately the use of a tandem breaker as a space-saving slender 220v breaker... But i have seem nothing.