TERA Resistance Blocks Tera Steel Grid Resistor Blocks Type BRC B / BRD B can be supplied with up to 30 elements. Power with 30 elements 15kW Steady state. TERA IP00 Tera Steel Grid Resistor Blocks with mounting brackets. Type BRC D / BRD D Each resistor module has one resistor block More modules can be connected. TERA IP20 Tera Steel Grid Resistor Blocks mounted in IP20 housings. Type BRC F / BRD F This version is the most economical ready to use version for in door applications. TERA IP23 Tera Steel Grid Resistor Blocks mounted in IP23 housings. Type BRC M / BRD M for internal cable connections without cable glands Type BRC N / BRD N for internal cable connection with cable glands This version is is for out door mounting i.e. on cranes