CAN/CSA C2.1 - Single-phase and three-phase liquid filled distribution Transformers

This document provides an overview of the requirements of Welding Requirements CSA-C2.1 – Single-phase and three-phase liquid-filled distribution transformers with respect to welding. It is designed to provide requirements for distribution transformers with the exception of those distribution transformers that are covered by CSA C2.2, C227.3, and C227.4.

Download the Reference Guide

Welding Standards

The Hydrogen Economy vs. Standards and Regulations – A Practical Perspective

Article

2026-01-19

What's New in CSA W47.1 2025

A breakdown of the CSA W47.1 welding standard updates for 2025

Video

2025-09-30

CSA Welding Certification Requirements When Repurposing Shipping Containers

Regulator's Corner

Article

2025-09-15

CSA W117.2 Safety in Welding Cutting and Allied Processes – 2025 Edition

So, what is new?

Article

2025-04-21

Reference Guides

CAN/CSA - S304.1-94 - Masonry Design for Buildings (Limit States Design)

Guide

CAN/CSA C2.2 - Pole-mounted single phase distribution transformers for electric utilities

Guide

CAN/CSA C227.3 - Low-profile, single-phase pad-mounted distribution transformers with separable insulated high-voltage connectors

Guide

CAN/CSA C227.4 - Three-phased pad-mounted distribution transformers with separable insulated high-voltage connectors

Guide