It is very important that electrical devices in a circuit are connected accurately by using cables with the correct voltage and polarity.
To ensure cables are connected correctly they are given unique numbers.
This is vital for maintenance and troubleshooting in the event of equipment failure.
Conductors on all electrical drawings are represented by straight lines.
we can see a line break for the conductor 45, assigned with the tag identifier, this is a line break reference (=GA02/5.6) indicating where the conductor’s continuation can be found.
The reference points to a different diagram group, therefore it is preceded with a plant identification sign (=). The continuation of the conductor 45 can be located in diagram group =GA02, sheet 5, sector 6, where it is assigned with a reference =GA01/10.8.