Hi Guys,
I've seen a few doorbell transformers being advertised by Friedland and Byron (reputable manufacturers) that can be fitted directly onto the din rail in the CU. This means that, by design, there is no circuit protection in the primary coils of the transformer. I know that the output is usually only 8VDC/1A and I believe the DC circuit returns to the transformer. Would I be right in believing that the lack of any earth or neutral conductor in the transformer assembly means that it cannot possibly short to earth and therefore doesn't need protection?
Also, would I be right in believing that it will not overheat because the only current in the unit will be in the secondary coil only while the doorbell button is pushed?
Thanks in advance for any answers.
I've seen a few doorbell transformers being advertised by Friedland and Byron (reputable manufacturers) that can be fitted directly onto the din rail in the CU. This means that, by design, there is no circuit protection in the primary coils of the transformer. I know that the output is usually only 8VDC/1A and I believe the DC circuit returns to the transformer. Would I be right in believing that the lack of any earth or neutral conductor in the transformer assembly means that it cannot possibly short to earth and therefore doesn't need protection?
Also, would I be right in believing that it will not overheat because the only current in the unit will be in the secondary coil only while the doorbell button is pushed?
Thanks in advance for any answers.