It is often necessary to use a saw to cut the junction from the joist to which it is attached.
Install recessed lighting junction box.
If you have an existing light fixture that you are replacing disconnect it before you begin the process of how to wire recessed lights.
Second the original wires removed from the old box will not be long enough to connect directly to the recessed fixture so you will have to install a junction box inside the ceiling.
Take care to avoid damaging wires which can sometimes have a short span making it more challenging to install a new housing.
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This rule is demonstrated nicely by wall switches receptacles and standard light fixtures all of.
When installing a recessed light fixture in the location of an existing light fixture you must remove the old fixture and disconnect and remove the wiring as well as the ceiling box.