Watts used for 240/120 3ph Delta setup?

[tinrat]

I would like to thank everyone one involved with the Mike Holt Forum for all the information I have read and learned from here.
I hope this is a properly posted inquiry.
I don’t understand how to calculate 3 phase Delta power consumption on a Boiler. All three lines show 15 amps consumption with an Ammeter. How many watts am i using?

 

[ptonsparky]

W=V*A*1.732 for a purely resistive load, three phase. Assuming elements are rated and supplied @ 240 volt

6235 = 240*15*1.732

Changing either voltage applied and/or rated voltage of elements will change wattage.