Your Instructor
Meet David Lethbridge
Senior Estimator/ Director of DGE Electrical Services
David is a licensed ‘A’ Grade Electrical Contractor with more than 20 years of hands-on experience across engineering, project management, and electrical estimation. As the founder of DGE Electrical Services, he has built a strong reputation for delivering high-quality, compliant, and cost-effective electrical solutions across residential, commercial, and industrial sectors.
Throughout his career, David has led complex projects from concept to completion, developing a deep understanding of technical design, project planning, risk management, and client communication. His expertise in cost control, accurate estimation, and workflow optimisation has made him a trusted advisor for businesses looking to improve efficiency and profitability.
Known for his commitment to safety, compliance, and industry best practices, David combines practical on-site knowledge with strategic project oversight. His passion for education and professional development has also driven him to create training programs that help electricians and business owners improve their skills, confidence, and overall performance.
Course Curriculum
- Disclaimer
- About Us - DGE Electrical Services
- 1.1 The Purpose and Mindset of Electrical Estimating
- 1.2 Understanding Project Documentation and Scope
- 1.3 Planing the Estimation Process
- 1.4 Managing Information Flow (RFIs, Agenda and Communication)
- 1.5 Safety, Compliance and Professional Standards in Estimating
- 3.1 Reviewing Drawings and Specifications
- 3.2 Setting Up the Estimate
- 3.3 Lighting Take Off and Quantification
- 3.4 Power and General Services Take Off
- 3.5 Circuit Design and Load Estimation
- 3.6 Switchboard and Distribution Design
- 3.7 Cabling & Containment System
- 3.8 Lighting & Power Take Off Process
- 3.9 Submains & Mains Estimation
- 3.10 Final Review, Reconciliation & Estimation Handover