The objective of this book is to explain the engineering principles behind best practice electrical panel building, including:

• Why should AC and DC wiring be kept separate?
• Why should different voltage wires cross at 90 degree angles?
• Why should wires never run parallel in the same trunking?
• Why should there be empty space around components and how much empty space should be allowed?
• How can heat dissipation requirements be calculated and can the required airflow be calculated?
• How will a fan improve air flow?
• How can panels be wired to ensure equipment is protected and able to be isolated for fault finding?
• Why should all ground wires should originate from a single point?
• What is the international standard for cable and wire marking?
• Is there a naming convention for wires based on their function?
• How can water and other contaminants be excluded from the enclosure? (e.g. positive pressure systems)
• When should shielded cable be used?
• When should twisted pair cables be used?
• How can temperature be managed?
• How can humidity be managed?
• How tight should terminals be tightened?
• What is the bending radius of wires?
• Why is there a minimum bending radius?
• What sort of lights should be used?
• What about drain holes and air vents?