An electrical splice box comprising an enclosure formed by a plurality of sidewalls surrounding a baseplate and extending substantially perpendicularly from the baseplate. The enclosure has an open side opposite the baseplate and is configured to enclose electrical splices. A cover may be removably attached to the open side of the enclosure. A plurality of slots are formed in at least some of the sidewalls, where at least some of the sidewalls have at least one slot. A plurality of cable locks are removably attached to the baseplate. Each cable lock is positioned at a corresponding slot to receive and to hold a cable inserted into the slot.