Here is your $8.60 Buzzbar used in high voltage panels. But what would I know I only have real world endorsements for High voltage switching licence A Grade Electrical licence in most states of Australia A Electrical Contractors Licence Hazardous Area Inspecting qualifications Standard & Cert 4 (Not that means a hell of a lot) for Gas industry Your obviously familiar with AS/NZS 3000:2018, Electrical installations, known as the Wiring Rules Now Bubble & Squeek...... you may enlighten us Lol