Practical Irrigation Wiring

Table of Contents

A.  Codes -- Complying with the NEC an NESC

B.  Equipment Listing Designates Its Use

C. Working Clearance Around Equipment -- 0 to 150 V and 150 to 600 V

D.  Clearance Between Power Lines and Irrigation Equipment

E.  Nominal Voltage Values Used

F.  Quiz -- Working Clearance Requirements

A.  Overview and Definitions

B.  Required Service Equipment Labeling

C.  Keep Service Entrance Conductors in Dedicated Raceways

D.  Service Disconnecting Means

E.  Identification of Service Disconnecting Means

F.  Towable Center-Pivot Connections

G.  Warning Ribbon Required Above Service Laterals

H.  Quiz -- Services and Service Equipment

A.  Five Steps To Selecting The Right Size Conductor

B.  Step 1 -- Determine the Ampere Rating of the Load to be Served

C.  Step 2 -- Determine Correct Design Temperature Ratings of Equipment

D.  Step 3 -- Selecting Conductors From Tables

E.  Step 4 -- Voltage Drop

F.  Voltage Drop Equations

G.  Practical Examples

H.  Quiz - Determining Ampere Loads and Selecting Conductors

A.  Definitions

B.  The Three Types of Grounding (overview)

C.  Equipment Grounding

D.  Grounding Electrode Systems

E.  Service Equipment Bonding

F.  Quiz - Bonding Service Equipment

A.  Raceways

B.  Rigid Nonmetallic Conduit

C.  Insulating Fittings (Where Required)

D.  Conduits Terminating Underground

E.  Conductors Exposed To Sunlight

F.  NEMA Enclosures

G.  Conduit Fill

H.  Sealing Unused Openings in Enclosures

I.  Quiz - Wiring Methods

A.  Introduction

B.  Motor Ratings

C.  Motor Controllers

D.  Motor Branch Circuits, Short-Circuits, and Ground-Fault Protection

E.  Motor and Branch Circuit Overload Protection

F.  Effect of Power Factor Capacitor on Setting of Overload Relay

G.  Selecting Conductors for Motors

H.  Selecting Equipment Grounding Conductors for Motors

I.  Quiz - Motors and Motor Circuits

A.  Phase Converters

B.  Power Factor Capacitors