I assume by daisy chained you mean the duplex receptacle device is used as a junction point to wire from one outlet to the next and so on. If that is the case I would advise you to hire an electrician to change out all the cheap residential grade duplex outlets in your home to a descent side wire spec grade TR duplex receptacle. The prime cause of electrical fires is from arcing. Those cheap stab in the back worn out outlets can cause electrical fires if they are connected to any descent size load. Worse yet if the duplex outlets are daisy chained.
The more duplex outlets connected in the daisy chain the greater the load on the feed through connections on the outlets upstream of the downstream connected loads, the greater chance of series arcing. It only takes a small load plugged in here and a small load plugged in there, repeated along the entire length of the branch circuit wiring to add up to a fair amount of load on the feed through contacts of the duplex outlets closest to the start of the branch circuit feed.
To make matters worse the 120V 15 amp daisy chained convenience outlet branch circuit/s may also be powering ceiling lighting loads as well.
It also should be mentioned, as in your case where only 5 duplex outlets are daisy chained along the length of the branch circuit run, there is no limit to the number of receptacles that can be connected to the branch circuit in a residential dwelling unit, per NEC Code. You may have other branch circuits in your home that have, 8, 10, or ??, connected to the a branch circuit. And again maybe ceiling lighting loads as well.
I did a quick search on the net and found this link with pictures showing a daisy chain branch circuit wiring and a pigtail method of branch circuit wiring. It also has pictures showing the cheap internal spring clip used in the quick stab in the back residential grade duplex receptacle. **(Link is supplied for picture purposes only.)
https://www.handymanhowto.com/how-to-replace-a-worn-out-electrical-outlet-part-1/
https://www.handymanhowto.com/electrical-outlets-side-wire-versus-back-wire/
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I would also recommend you have the electrician pigtail out the hot, neutral and equipment ground wires to connect to the new duplex receptacle outlets. Though the equipment ground bare wires should already be pig tailed per NEC code, have him make 100% sure the method used is a 100% solid connection. Just twisting the bare ground wires together and sliding a cheapo crimp barrel over the twisted wires is a poor pressure connection if the equipment ground of the branch circuit is called upon to carry ground fault current back to the source, in the event of a ground fault event.
As for the type of wire connectors used to make up the joints and pigtails in the outlet box I would recommend a spring type connector. Example is 3M Scotchlok brand or equal. Ideal and Buchanan wire conductors are also very good. These are the type of wire connectors that are found is the wiring specs of commercial buildings and industrial facilities. The steel spring inside the connector is designed to expand and contract with the wires keeping the connection of the wires tight at all times.
Varying connected loads to the branch circuit wiring can cause the conductors to expand, high loads, and contract, little or no load. Good example of adding a big temporary load to a 120V 15 amp branch is plugging in a portable vacuum cleaner that has a motor that draws 12 amps. (Imagine what a 12 amp connected load does to the connections in the cheapo stab in the back residential grade duplex receptacle.)
The Buchanan yellow B1 twist on connector works great for connecting 3 or 4, #14awg solid wires together. (Also for up to 3 #12awg wires)
Example:
https://www.grainger.com/product/BUCHANAN-Twist-On-Wire-Connector-6VG18?opr=APPD&pbi=6VG26&a...
Stay away from using the hard plastic twist on wire connectors. These are fine for connecting the leads of a light fixture and such to a branch circuit.Avoid the quick connect crap that is being used today by some residential electrical contractors. IMO, they are no better than what you have now. They may work fine when new but how will they be 15 years from now?
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