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In this video I show you how to prepare a muff for a three-phase service in 220 volts, the video is only illustrative since each connection is prepared according to the load to be used and the material used in each project also depends on that. #how to install #electricmuff #electricity #electricitytutorial #plumbingandelectricity Here is the list of materials that I used, it may vary depending on where it is going to be installed. 1 Base for three-phase meter with 7 jaws of 100 Ampers. 1 3X60 A switch box. 1 1/2 ”thick wall tube. 1 1/2” thin wall green label tube. 1 1/2” muff 7 1 ”American type connector. 2 1/2" American type connector 1 1" to 1/2" bushing reduction 15 meters of #8 gauge cable, Iusa or Condumex brand, black in color. 8 meters of #8 gauge cable, Iusa or Condumex brand, white in color. 1 1/4" Omega clamp 3 1/2" Omega clamp 1 1/4" to 3/4" bushing reduction 1" Condulet Tee 1 1" thin wall 90º elbow. 2 1" American type coupling. 1 1.5 meter copper rod. 1 Connector for copper rod.