So its 3am and im staring at a SLD for a new cabinet install and realized half the people in this field cant read these things anyway. Heres the 5 minute version for anyone who got thrown into datacenter work without the EE degree
Single line = one line represents all three phases. Dont panic when you only see one wire. The little slash marks tell you how many cables are actually in the conduit
Transformer symbols: circles with squiggles inside. Two squiggles = delta, wye looks like a Y (shocker). Match your PDU input or enjoy the magic smoke
Breaker ratings: the number in the rectangle is trip rating, not what you can actually pull continuously. Derate to 80% for continuous loads. 20A breaker = 16A usable. Dont be that person running 19A on a 20A and wondering why it trips at 2pm on tuesday
Anyway thats the basics. The rest is j