Are these buses bonded?

[Joe Funderburk, CMI]

I could not tell if the neutral and ground bus in this service entrance equipment panel are bonded together. Shouldn't I see a metal strap between the two? Or is the metal strap perhaps encased in the becalite?

[Greg Fretwell]

The interbus bonding strap is buried in the black stuff but I don't see the bond to the can. That hole about 2" up on the left side is suspicious because that is about where the bonding lug might go

[Harold E. Miller]

Yes they are bonded together...and the small grounding buss is attached directly to the panel housing, with a lead connected to the right hand buss. All is bonded.

[Greg Fretwell]

I don't see a 4ga wire on that little bus (250.66)