Conduit system inside door frame for access control

[jamdu]

1. In CMU wall area, we installed rigid conduit toward door opening under situation which we don't exact door hardware(door contact, EPT, EM lock) location. After that how can we install conduit inside door frame for connecting to door hardware ? (I am planning to install flexible conduit type & FMT 90 degree connector inside door frame up to door hardware location. and then mortar will be filled between door frame and door opening. Can we do that?)
2. In any wall area, door frames don't have junction box welded to door frame. Do you guys know how to install conduit & cable for door hardware?

In spite of that ACS is low voltage system, Should be it affected by NEC strictly? If you have a lot of experience about Door hardware or Access Control, Please give me good recommendation.

 

[infinity]

We would use a box like this. They can be added to the door frame or ordered with the frame where they're already welded to the frame.

https://www.doorwaysplus.com/sdc-7560eb-2-electric-lock-mortar-box.html

 

[don_resqcapt19]

1. In CMU wall area, we installed rigid conduit toward door opening under situation which we don't exact door hardware(door contact, EPT, EM lock) location. After that how can we install conduit inside door frame for connecting to door hardware ? (I am planning to install flexible conduit type & FMT 90 degree connector inside door frame up to door hardware location. and then mortar will be filled between door frame and door opening. Can we do that?)
2. In any wall area, door frames don't have junction box welded to door frame. Do you guys know how to install conduit & cable for door hardware?

In spite of that ACS is low voltage system, Should be it affected by NEC strictly? If you have a lot of experience about Door hardware or Access Control, Please give me good recommendation.

348.42 prohibits the 90° connector from being concealed.

On prison job I did many years ago, the frame was pre-piped with ENT between the connection/position switch box at the top of the frame and the lock connection box on the side of the frame. When I first saw that, I thought there would be no way to get the wire through the ENT as they had bent it as tight as physically possible at the transition between the vertical and horizontal at the top of the frame, but the 3 #18 stranded wires went right around the bend with no issues.