The recommended wire size for the 30P3.0-JMCS-G-TF(N) connector is 24-20 AWG.
The 30P3.0-JMCS-G-TF(N) connector has a waterproof design, but it is not fully waterproof. It is rated IP67, which means it can withstand immersion in water up to 1 meter for 30 minutes.
The maximum current rating for the 30P3.0-JMCS-G-TF(N) connector is 3A per pin.
The 30P3.0-JMCS-G-TF(N) connector is rated for up to 250V AC/DC, but it is not recommended for high-voltage applications above 250V.
The 30P3.0-JMCS-G-TF(N) connector is part of the JST GH series, which is compatible with other GH series connectors, but not with other JST series connectors.