扭接式连接器是一种常见的低压电路连接器，广泛应用于家用电器和类似用途的电器设备中。IEC 60998-2-4:2004 标准规定了扭接式连接器的特殊要求，以确保其安全可靠地连接低压电路。

该标准要求扭接式连接器必须符合以下要求：

1. 连接器必须能够承受额定电压和额定电流下的负载，并保持连接稳定。

2. 连接器必须能够在正常使用条件下承受机械应力和环境影响，如振动、温度变化、湿度等。

3. 连接器必须能够防止电线脱落或松动，并保持电线的正确位置。

4. 连接器必须能够防止电线之间的短路或接触不良，并保证电路的安全可靠。

5. 连接器必须符合相关的安全标准和法规要求。

此外，该标准还规定了扭接式连接器的外观、尺寸、材料、标志和包装等方面的要求。

IEC 60998-2-4:2004 标准的实施可以提高扭接式连接器的安全性和可靠性，减少电器设备故障和事故的发生，保护用户的生命财产安全。

相关标准
- IEC 60998-1:2002 Connecting devices for low-voltage circuits for household and similar purposes - Part 1: General requirements
- IEC 60998-2-1:1998 Connecting devices for low-voltage circuits for household and similar purposes - Part 2-1: Particular requirements for connecting devices as separate entities with screw-type clamping units
- IEC 60998-2-2:1998 Connecting devices for low-voltage circuits for household and similar purposes - Part 2-2: Particular requirements for connecting devices as separate entities with insulation-piercing clamping units
- IEC 60998-2-3:1998 Connecting devices for low-voltage circuits for household and similar purposes - Part 2-3: Particular requirements for connecting devices as separate entities with screwless-type clamping units
- IEC 60998-2-5:2003 Connecting devices for low-voltage circuits for household and similar purposes - Part 2-5: Particular requirements for connecting devices as separate entities with insulation displacement connections (IDC)