Sebco buck and boost 12 volt lighting transformer wiring information.

I wanted to confirm that my landscaper connected my SEBCO transformer correctly. I have a SEBCO 500W 12V (#1084) Transformer with (2) 25 amp circuit protectors. I have two cables (10/2 gauge) running from the transformer to power two 250 watt circuits. Each circuit breaker has a red wire connected to one terminal (labeled X2 on one breaker, X4 on the other breaker). One wire from each cable is connected to the other terminal of each breaker (I presume this being the "hot" wire as these wires are connected to the black wires on each light on the circuit). The neutral wire from each cable is joined together along with the red wires labeled X1 and X3 into a four wire bundle and tied together with a wire nut. Should the neutral wires plus X1 & X3 wires be joined together this way (it''s a "bulky" connection)or should the neutral wire from each cable be joined only with one return wire on the transformer (X1 or X3)? If the latter, which cable should be connected to X1 and which to X3? Thank you

On a Buck and Boost transformer you have several ways to configure the wiring to vary the output voltage. For example, on the secondary side, if you connect X1 and X3 together and X2 and X4 together you get a 12 volt output. On the other hand, if you connect X2 and X3 together and use X1 and X4 as your outputs, you get 24 volts. The same is true on the primary side for switching between 110 and 220 volt inputs. Either way, one side of the output should run through the circuit breakers. And you are right, sometimes it does make for a bulky connection.

Labels: Buck and Boast Transformer, SEBCO Transformer, Transformer Bulky Connection

posted by xinger @ 8:29 AM