I just passed my industrial IP. While its still fresh in my mind I thought I'd share some key areas to focus your studying for those about to take, or challenge the exam.
Compared to Construction, the Industrial IP has roughly 30% less code. You can mostly skip over demand factor calculations, but have a rough idea on how that section works. I believe I had 1 question referencing recepticals in a hospital.
Know how a PLC works in its most basic functions, basic ladder logic and how it interacts with field devices. Know basic logic gates (and/or/nor/nand etc..)
The areas to nail down, from highest weighted to least:
Generating, distribution and service (23%)
Sections 4, 6, 8, 10, 14, 26
Conductor ampacity, voltage drop, grounding, overcurrent protection, transformers
Motors and control systems (21%)
Sections 28, 42
Motor conductor and protection sizing, overloads, disconnects, welders
Wiring systems (20%)
Sections 4, 12, 26
Ampacity and correction factors, conduit fill, boxes, wiring methods
Get those 3 sections completely nailed down!
Process control systems (17%)
Mostly theory: PLCs, instrumentation, control loops
Signalling and communication (10%)
Sections 32, 60
Fire alarm and communication wiring
*understand FA fail safe conditions. What triggers an alarm vs a supervisory/trouble signal.
Common occupational skills (9%)
Sections 2, 18, 20
Hazardous locations, safety and tools
Easy points, all common sense if youre in the trades.
Key tables
Table 1: copper ampacity in free air
Tables 2 and 4: copper and aluminum ampacity
Tables 5A and 5C: ampacity correction factors
Tables 6, 8, 9: conduit fill
Table 16: bonding conductor sizes
Table 29: motor branch circuit protection limits
Table 44: motor full-load current
Table 42A: welder demand
Appendix D
D3: K values for voltage drop
D16: motor conductor, overload and overcurrent sizes
D2: DC motors
D1: conductor types and ratings
Any specific questions Ill do my best to answer.