Max number of conductors in 3/8 FMC

[WorthFlorida]

I'm doing wiring job in my garage to add one outlet for a refrigerator (17 Cu Ft) and a ceiling outlet for 2 LED shop lights at 35 watts each. Today, I ran 4 conductors (THHN) inside a 3/8" FMC and it was quite a chore. One of each, Grn, Wht, Blk, Red. The FMC is only about 6 ft long from a wire mold channel to a 4" octagon juncture box. The refrigerator will be on its own 15 amp breaker (red wire) and the ceiling outlet (about 9 ft off the garage floor) will be a switch circuit from a recently added breaker for extra outlets over the work bench.

Question: The chart below reads 3 or 4 conductors depending on internal or external connectors. What is defined as internal or external connectors?

 

[Stuff]

Never dealt with that as always have MC cable but guess is internal connector is one of those that screws into the end of the FMC. External would be normal clamp type connector.

 

[Sponsor]

 

[WorthFlorida]

My assumption is these are external connectors and internal would be the clamp type inside electrical boxes? I used the one on the left side of the image.

 

[Reach4]

https://www.frostelectric.com/buy/product/bridgeport-519-dc2/125999
Also see the first picture on this page:
http://amftgs.com/liquid-tight-conduit-fittings/

 

[WorthFlorida]

Got it. Never seen that type of internal connector. Thanks