In heavy-duty industrial high-current applications, a grid resistor is a large convection-cooled lattice of stamped metal alloy strips connected in rows between two electrodes. Such industrial grade resistors can be as large as a refrigerator; some designs can handle over 500 amperes of current, with a range of resistances extending lower than ohms. They are used in applications such as dynamic braking and load banking for locomotives and trams, neutral grounding for industrial AC distribution, control loads for cranes and heavy equipment, load testing of generators and harmonic filtering for electric substations. 
Critical Resistance seeks to build an international movement to end the Prison Industrial Complex by challenging the belief that caging and controlling people makes us safe. We believe that basic necessities such as food, shelter, and freedom are what really make our communities secure. As such, our work is part of global struggles against inequality and powerlessness. The success of the movement requires that it reflect communities most affected by the PIC. Because we seek to abolish the PIC, we cannot support any work that extends its life or scope.