M
mr brightside
Firstly hello fellow sparkies!
Secondly, can anyone tell me whether the regs define the supply side of an MCB as being the top or bottom? I always considered it good practice to define the supply side as the bottom as that is the way they are always connected in CU's, and why use two systems of wiring as this could create an electrocution hazard for maintenance personnel working on what they think is dead wiring.
I used to work on maintanance and i am an apprentice trained electrical engineer currently working for a panel wiring firm, we build process alarm systems based on Rittal cabinets with our annunciators fitted in the door.
Twice lately the drawing office have sent down customer approved drawings with the power supply MCB, which is mounted on DIN rail on the cabinet backplate, supplied from the top on the grounds that with the cabinet being top entry it's easier for the customer to connect their supply. They are usually supplied from the bottom and always have been ever since i've been there. Today i ignored the drawing and wired the cabinet supply wires out of the top as per what i would consider to be good practice. Dispite explaining my working i was overidded by both the assistant draftsman and the system test technician, neither of whom are electricians and neither of whom have passed the IEE regs course, and was instructed to rewire the MCB.
This isn't a pride issue, dispite the heirachy problem there, it's an issue of good practice. When i take it up with the supervising draftsman when he returns from his hols i'd like to be able to quote something from the regs to back myself up, i have a copy of the 16th ed. if anyone wants to refer me to a part etc. Other than that...i am right aren't i?
Secondly, can anyone tell me whether the regs define the supply side of an MCB as being the top or bottom? I always considered it good practice to define the supply side as the bottom as that is the way they are always connected in CU's, and why use two systems of wiring as this could create an electrocution hazard for maintenance personnel working on what they think is dead wiring.
I used to work on maintanance and i am an apprentice trained electrical engineer currently working for a panel wiring firm, we build process alarm systems based on Rittal cabinets with our annunciators fitted in the door.
Twice lately the drawing office have sent down customer approved drawings with the power supply MCB, which is mounted on DIN rail on the cabinet backplate, supplied from the top on the grounds that with the cabinet being top entry it's easier for the customer to connect their supply. They are usually supplied from the bottom and always have been ever since i've been there. Today i ignored the drawing and wired the cabinet supply wires out of the top as per what i would consider to be good practice. Dispite explaining my working i was overidded by both the assistant draftsman and the system test technician, neither of whom are electricians and neither of whom have passed the IEE regs course, and was instructed to rewire the MCB.
This isn't a pride issue, dispite the heirachy problem there, it's an issue of good practice. When i take it up with the supervising draftsman when he returns from his hols i'd like to be able to quote something from the regs to back myself up, i have a copy of the 16th ed. if anyone wants to refer me to a part etc. Other than that...i am right aren't i?
