AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 70)

Single- and Dual-Blower Continuous Vacuum/Pressure Systems Page 69
Safety Tag Information 12
12-1 Continuous Vacuum/Pressure System Safety
Tags
Shear Point Read Operation
Hazard and Installation
Manual
High Voltage Earth Ground
Inside Enclosure
PE
Protected Earth
Lifting Point Ground