Abstract: In one aspect, a contact block for use with an electrical relay includes a grippable portion and a plurality of blocking portions extending from the grippable portion. The plurality of blocking portions are oriented in a parallel relationship relative to each other. The grippable portion and the plurality of blocking portions are substantially coplanar. In another aspect, a control system includes an electrical relay having a base, a contact arrangement supported on the base and a cover moveable between at least a first position, wherein the cover is releasably secured to the base over the contact arrangement, and a second position wherein the cover is disengaged from the base with the contact arrangement exposed to the user. The system further includes a contact block having a primary blocking portion and a secondary blocking portion.