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need identification of componants in this switchboard

Started by RB, March 26, 2019, 04:24:33 PM

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I have seen various versions, but still learning.
This is a 5 extension switchboard.
With what appears to be 4 trunk drops at the top?
or are they ring back drops? and if so, how come only 4???
That is what I need an explanation of.
second photo added