GB/T 43815-2024
Rigid polyvinyl chloride (PVC-U) insulated electrical casing and accessories for construction (English Version)

Standard No.

GB/T 43815-2024

Language

Chinese, Available in English version

Release Date

2024

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China  CN  /  GB

Latest

GB/T 43815-2024

Introduction

Interpretation of the core content of the standard

Technical dimensions	Solid wall casing	Corrugated casing	Accessories
Density requirement	≤1,580 kg/m³
Compressive performance	Load deformation≤25% Unloading recovery≤10%	Load deformation≤25% Unloading recovery≤10%	-
Impact performance	10/12 no damage	10/12 no damage	-
Heat resistance grade	-25℃~90℃ divided into 5 types		Indentation diameter ≤2mm

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Details of key technical requirements

1. Material specifications

The standard clearly stipulates:

• The main material must be PVC resin (K value ≥66 for casing, ≥55 for accessories)
• The use of lead-containing additives is strictly prohibited (lead content ≤0.02%)
• It is allowed to add ≤10% homogeneous recycled materials

2. Mechanical property classification

Application case: According to the electrical load requirements of a commercial complex project, heavy-duty bushings (code 4) were used for the main lines and medium-duty bushings (code 3) were used for the branch lines, which ensured safety and optimized costs.

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Key points of the test method

Test items	Key parameters	Equipment requirements
Compression test	Loading rate 30±3s	0.02mm precision measuring tool
Impact test	-25℃±1℃ pretreatment 2h	10kg steel base test bench
Electrical test	2,000V/15min withstand voltage	50Hz sine wave power supply

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Implementation suggestions

1. Selection Guide

Select the temperature grade according to the ambient temperature:

• Northern cold regions: give priority to -25 type or 90/-25 type
• Concrete pouring scenario: must use 90 type

2. Quality Control

Industry Practice: Leading companies use online diameter gauges to monitor wall thickness deviation in real time, and use XRF spectrometers to quickly screen lead content to ensure compliance with the requirements of Clause 6.7.

3. Standard Evolution

Main improvements compared to the old version:

• Added 90/-25 composite temperature grade
• Strengthened flame retardant index (oxygen index ≥32)
• Detailed corrugated casing gauge inspection specifications

GB/T 43815-2024 Referenced Document

• GB/T 1033.1 Plastics.Methods for determining density of non-celluar plastics.Part1:Immersion method,liquid pyknometer method and titration method
• GB/T 192 Common Threads Thread Profile*， 2025-05-30 Update
• GB/T 19278 General terms and their definitions of thermoplastic pipes, fittings and valves
• GB/T 196 Basic dimensions of common thread*， 2025-03-28 Update
• GB/T 2406.2 Plastics.Determination of burning behaviour by oxygen index.Part 2:Ambient-temperature test
• GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
• GB/T 2918 Standard environment for conditioning and testing of plastic specimens
• GB/T 5761 Universal polyvinyl chloride resin for suspension method
• GB/T 8806 Plastics piping systems.Plastics components.Determination of dimensions

GB/T 43815-2024 history

• 2024 GB/T 43815-2024 Rigid polyvinyl chloride (PVC-U) insulated electrical casing and accessories for construction

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