3871 mcbs's

[stub]

Can an old type 2 (3871) be used to replace a type 3 (3871)¿

 

[Murdoch]

Why?

Best you replace the consumer unit / fuseboard as those have been obsolete for a long time

 

[Fleeting]

If it is a compatible device then yes. You must consider whether a type 2 is suitable if a type 3 was initally employed.