It's fairly simple to test. Connect some power-insensitive device to each of the power point (i.e. those devices that won't give trouble if directly turned off - for instance, small fan or power adapter). Turn on all these devices.

Then, in the DB board, take out the circuit breaker for each of the newly installed points. If only one device switches off, then you have a direct connection. If multiple devices switches off, then you have a loop circuit.

This post has been edited by cwtien: Jul 20 2015, 11:04 AM